Persian hand-knotted carpet is one of the most technically demanding and culturally layered textile traditions in human history — a practice built one knot at a time across tens of thousands or millions of individual pile units, each tied by hand to warp threads on a loom, at densities ranging from 80 KPSI (knots per square inch) in village weaving to 2,500 KPSI at the physical ceiling of Qom silk production. For a Patreon creator, it is also a remarkably rich niche: technically complex enough to generate years of original educational content, historically deep enough to sustain cultural documentation work across the full range of Iranian and broader Middle Eastern textile heritage, and commercially well-positioned because the audience — Iranian diaspora, international rug collectors, and textile art practitioners — skews heavily toward iPhone, making web-only subscription routing particularly valuable when the Apple Tax takes effect in November 2026.
Two primary knot structures underlie the entire hand-knotted carpet tradition. The Ghiordes knot — also called the Turkish knot or symmetrical knot — wraps the pile yarn around two adjacent warp threads, producing a pile unit that sits symmetrically across the warp pair. The Senneh knot — also called the Persian knot or asymmetrical knot — wraps the pile yarn completely around one warp and passes behind the adjacent warp, producing an asymmetric unit that can be oriented in two directions and that enables higher KPSI because each knot occupies less horizontal space along the warp. These two knot types are not arbitrary variants; they produce different structural properties, enable different ranges of pile density, and are each associated with specific regional traditions that have refined them over centuries.
KPSI is the unifying technical concept of hand-knotted carpet education: a single number that captures the relationship between knot structure, warp sett, weft tension, and design resolution. Understanding how to calculate KPSI, what it implies for the designs that are achievable, and how the structural technique of weft depression enables higher KPSI through warp geometry manipulation — this is the technical core around which a Persian carpet Patreon curriculum organizes. This post covers all of it, along with the major regional traditions, wool and silk selection, pile nap mechanics, and the Apple Tax calculations that determine how much iOS-heavy creators lose on Patreon from November 2026.
Ghiordes knot mechanics: the symmetrical knot
The Ghiordes knot takes its name from the ancient city of Gordion (modern Yassıhüyük in Turkey), where examples of pile knotting consistent with this technique were found in Phrygian archaeological contexts, though the knot is more commonly associated with the weaving traditions of Anatolia, the Caucasus, and northwestern Iran. In practice and pedagogy the Ghiordes knot is also called the Turkish knot or the symmetrical knot — the last name being technically descriptive of the geometry.
The execution: a length of pile yarn is passed behind two adjacent warp threads simultaneously. The two ends of the yarn are then brought forward — one end wrapping over the left warp and emerging in front between the left and right warps, the other end wrapping over the right warp and emerging in front to the right of the right warp. When cut to pile height, the result is a pile unit that sits symmetrically across the warp pair: the pile yarn is visible on the back of the carpet running behind both warps as a single arching span, and the two pile ends emerge on either side of the pair in mirror positions. This symmetric two-ended geometry is the source of the name 'symmetrical knot.'
The structural consequence of this geometry is considerable: both warp threads are under equal yarn load, and the pile unit resists lateral pull in both horizontal directions equally. The knot cannot be displaced easily to the left or right because both warps anchor it. This high structural stability is the reason the Ghiordes knot is preferred in weaving traditions where carpet durability under foot traffic is a primary design criterion — Anatolian Turkish production, Caucasian tribal weaving, Kurdish carpet traditions, and the Heriz regional tradition of northwestern Iran all favor the Ghiordes knot for this reason. The additional warp engagement (two full warp threads per knot versus one full and one partial in the Senneh) means each knot occupies more horizontal space, which places a ceiling on achievable KPSI relative to Senneh knotting at equivalent yarn thickness and warp sett.
The Jufti Tabriz knot — the primary variant of the Ghiordes type — ties the pile yarn over four adjacent warp threads instead of two. The word 'jufti' means 'pair' or 'double' in Persian, reflecting the fact that the knot spans two warp pairs rather than one. Jufti knotting halves the KPSI relative to single-pair Ghiordes knotting on the same warp sett: if standard Ghiordes on a given warp yields 400 KPSI, Jufti Tabriz on the same warp yields 200 KPSI. This is not an error or a shortcut; it is a deliberate production decision for large-format carpets where faster production is the priority and the design vocabulary (typically bold medallion work or pictorial compositions at viewing distances that do not require maximum KPSI) is suited to the lower density. A 15×20 foot Tabriz carpet commission at Jufti density can be completed in a fraction of the time required at standard density, while still achieving a high-quality visual result at viewing distance.
The Tabriz weaving center is also notable for its specialized tool, the tebrizî: a combined hook-and-knife instrument that simultaneously catches the pile yarn, draws it through the warp pair into knotting position, and cuts it to pile height in a single integrated motion. The tebrizî allows a skilled Tabriz weaver to work faster than the standard two-handed method used elsewhere in Persia, where the weaver ties the knot manually and then uses a separate carpet knife to cut the pile. This production-efficiency focus reflects Tabriz's position as the most commercially scaled of the Persian carpet centers — a city with centuries of experience producing carpets for export markets ranging from the Ottoman court to 20th-century European luxury retailers.
Senneh knot mechanics: the asymmetrical knot
The Senneh knot takes its name from Sanandaj (formerly Senneh), the capital of Kurdistan Province in western Iran — somewhat paradoxically, since the knot is more characteristic of central Iranian weaving traditions (Isfahan, Kashan, Qom) than of Kurdish weaving, which actually tends to use the Ghiordes knot. The name reflects the historical European nomenclature for the two knot types, which assigned geographic names somewhat arbitrarily; the functional descriptor 'asymmetrical knot' or 'Persian knot' is more consistently used by technical writers.
The execution: a length of pile yarn is passed completely behind one warp thread, wrapping 360 degrees around it so that the yarn goes behind the warp, comes forward on the right side of the warp, crosses in front of the warp, and passes behind the adjacent (right) warp — but without wrapping around that adjacent warp. Both ends of the pile yarn then emerge from the front of the carpet through the space between the two warps (the inter-warp space adjacent to the partially-engaged right warp). When cut to pile height, both cut pile ends point forward from the same inter-warp space. The back of the carpet shows the pile yarn running completely behind the left warp (the fully-wrapped warp) and passing behind the right warp (the partially-engaged warp), but with an asymmetric distribution: the yarn mass behind the left warp is heavier (full 360-degree wrap) than the yarn mass behind the right warp (single pass-behind).
The orientation of the Senneh knot can be varied: a left-open Senneh has the fully-wrapped warp on the left and the pile ends emerging on the right of that warp; a right-open Senneh reverses this. In the finished carpet, left-open and right-open Senneh knots produce a pile that tilts slightly in different directions, allowing a weaver to control the micro-direction of pile tilt across the carpet surface. Skilled Persian designers exploit this: areas of a carpet where the pile is planned to catch light can be woven with a specific knot orientation that maximizes light reflection toward the viewer, while adjacent areas use the opposite orientation to create subtle tonal contrast. This is a design capability unavailable in Ghiordes knotting, where the symmetric pile geometry produces the same tilt behavior regardless of weaver orientation.
The KPSI advantage of the Senneh knot is structural: because each knot unit wraps one warp fully and one warp partially (rather than wrapping two warps fully as in Ghiordes), the knot unit can be narrower in the horizontal dimension for equivalent yarn thickness. In practical terms, a fine Senneh knot in the hands of an Isfahan weaver working with kork wool at a high warp sett can achieve horizontal densities that would be impossible with Ghiordes knotting of the same yarn at the same warp count. The partial engagement of the right warp leaves that warp less burdened with pile yarn, allowing the warps to be set more closely together without the adjacent pile units interfering with each other. This narrower horizontal profile is the mechanical reason that the Senneh knot dominates in the highest-KPSI traditions: Isfahan, Kashan, Tabriz fine grade, and Qom silk.
In practice, the difference in achievable KPSI between Ghiordes and Senneh knotting — on the same loom, same warp sett, same pile yarn — is approximately 20–30%: a Senneh-knotted carpet on a warp sett that yields 20 Ghiordes knots per inch might yield 24–26 Senneh knots per inch, because the Senneh unit's asymmetric geometry allows slightly tighter horizontal packing. Combined with the weft depression technique (discussed in the next section), this structural advantage compounds: the formal Isfahan tradition achieves KPSI values that would be structurally impossible with Ghiordes knotting on the same warp count.
KPSI calculation and design resolution
KPSI — knots per square inch — is calculated as the product of horizontal knot density and vertical knot density: KPSI = (knots per horizontal inch) × (knots per vertical inch). It is the single most important technical descriptor of a hand-knotted carpet's production quality and design capability, and it is the central concept around which a Persian carpet Patreon curriculum organizes all other technical content.
Horizontal knot density is determined by the warp sett — specifically, how many warp thread pairs are arranged per inch across the carpet width. For a Ghiordes knot, each knot occupies one warp pair (two adjacent warps), so horizontal knot density directly equals the number of warp pairs per inch. For a Senneh knot, each knot occupies one inter-warp space (the space between each consecutive pair of warps), so again the horizontal knot density equals the warp pairs per inch. The warp sett is established when the warp threads are mounted on the loom before weaving begins; once set, it determines the horizontal density ceiling for the entire project.
Vertical knot density is determined by weft row density — how many knot rows fit in one vertical inch after the weft threads between rows are beaten down with the comb beater. After each row of knots is tied across the full width of the carpet, two ground weft passes (horizontal structural threads that lock the knots in place) are inserted through the shed and beaten firmly against the just-tied knot row. The firmness and frequency of beating compresses the weft-and-knot rows together; firmer beating produces higher vertical density; looser beating produces lower vertical density and a more open pile structure. The target is typically a 1:1 or slightly rectangular knot unit — horizontal knot spacing and vertical knot spacing approximately equal — because the cartoon design grid (one square per knot) assumes square knot units.
The KPSI range across the tradition spans two orders of magnitude: at 10 warp pairs per inch and 10 weft rows per inch = 100 KPSI, which is the level of tribal and village production (Heriz, Qashqai, Baluch tribal). At 15 pairs × 15 rows = 225 KPSI, medium commercial production. At 25 pairs × 30 rows = 750 KPSI, fine Isfahan collector grade. At 30 pairs × 30 rows = 900 KPSI, very fine Isfahan or Kashan. At 50 pairs × 50 rows = 2,500 KPSI, the achievable ceiling in Qom silk pile work. These are approximate reference points; actual carpet KPSI is measured from a finished piece by counting knots in one inch in each direction from the back face of the carpet, then multiplying.
Design resolution is the design consequence of KPSI. Each knot is one pixel of the carpet's image: a carpet at 100 KPSI has 100 pixels per square inch; a carpet at 900 KPSI has 900 pixels per square inch. A diagonal line drawn at 45 degrees in a 100 KPSI carpet must be rendered as a staircase of one-knot steps — each step is 0.1 inch wide and 0.1 inch tall, clearly visible as a staircase artifact at normal viewing distance (1–2 meters). At 400 KPSI, the staircase step is 0.05 inch × 0.05 inch — the steps are visible at close range but merge to apparent smoothness at typical viewing distance. At 900 KPSI, the step is 0.033 inch in each dimension — imperceptible at any normal viewing distance, and fine enough to render individual leaf veins, calligraphic letter strokes, and detailed facial features with natural softness.
The design-KPSI relationship means that every design decision must be evaluated against the KPSI of the intended carpet. Bold geometric medallion designs with large color fields and angular edges — the Heriz vocabulary — are fully suited to 100–150 KPSI and would gain nothing from higher KPSI; in fact, high KPSI would soften the angular precision that gives Heriz its visual character. Dense arabesque scrollwork with curvilinear vines and small-scale palmette details — the Isfahan vocabulary — requires a minimum of 400 KPSI to render the curves convincingly at viewing distance, and benefits significantly from 600–900 KPSI for maximum articulation of the fine vine branches and flower details. Pictorial work with human faces and naturalistic landscape backgrounds — the highest-resolution Qom tradition — requires 1,000+ KPSI for convincing results and reaches its full expressive potential above 1,500 KPSI. Matching KPSI to design vocabulary is the fundamental planning decision of any carpet project.
Weft depression: the structural technique for high KPSI
Weft depression is the structural technique that allows formal Persian weaving to achieve high KPSI beyond what a simple flat-warp construction would permit. It is the foundation of the Isfahan and Kashan pile density advantage, and understanding it mechanically is essential for any carpet weaver working toward formal Persian construction.
In a flat-warp construction — the standard for Caucasian and tribal Persian weaving — all warp threads lie in a single horizontal plane when the loom is viewed in cross-section from the side. After a knot row is tied and ground weft passes are inserted and beaten, the weft weaves over and under alternate warps in a plain-weave sequence, and all warps remain at the same elevation. The back of such a carpet shows all warp threads equally prominent; the structural cross-section is a single plane of warps connected by alternating weft undulations. This is 'no depression' construction.
In a depressed-warp construction, the weft threads are applied with deliberately differential tension to force alternate warps — call them the back warps — into a lower plane behind the front warps. The mechanism: instead of a single weft pass with uniform tension after each knot row, two distinct weft passes are used, each with a different tension. The first weft pass (the back weft) goes through the open shed under high tension, bearing firmly against the back warps and pushing them rearward. The second weft pass (the front weft) goes through the reversed shed under lower tension, resting gently against the front warps at the natural plane. The combination of high-tension back weft and low-tension front weft creates a stable two-plane warp geometry over successive rows: front warps remain at the face level; back warps are progressively pushed behind them by the cumulative tension differential.
The practical KPSI consequence of weft depression: when back warps are pushed into the deeper plane, the pile knots tied in subsequent rows can be packed more closely horizontally. The pile ends emerge over the front warps at the carpet face; the back warps are concealed behind the pile mass. Because back warps are not visible from the carpet face, they do not occupy effective horizontal space in the pile surface — they are structural elements hidden behind the pile, not visible knot-column positions. The effective horizontal knot density increases: the same absolute warp count now presents more visible pile-attachment positions per inch of carpet face, because the back warps are concealed rather than consuming visible surface space.
Full weft depression — in which the back warps are completely concealed behind the front warps, invisible from the carpet face and visible only from the carpet edge in cross-section — is the structural signature of Isfahan and Kashan weaving. When you examine a high-quality Isfahan or Kashan carpet edge-on (holding the carpet and looking at the cut edge across the warp direction), you can see two distinct planes of warp threads: the front warps closer to you, the back warps recessed behind them, with a visible gap between the two planes. This two-plane edge view is the hallmark of full warp depression, and it is the structural basis for the KPSI levels that Isfahan and Kashan achieve.
Partial depression — back warps lower than front warps but still partially visible — is characteristic of Tabriz production. No depression — flat construction with both warps in the same plane — is standard for Caucasian and tribal traditions, Heriz village weaving, and for all traditions where bold geometric design vocabulary and structural durability are prioritized over maximum KPSI. The depression level chosen at the beginning of a carpet project is a structural commitment: changing from no-depression to partial or full depression requires a different loom setup (specifically, different weft shuttle tension discipline and often a different warp thread diameter relationship between front and back warps) and cannot be introduced partway through a piece without creating a visible structural anomaly at the transition row.
To create full warp depression on a vertical carpet loom, the weaver needs consistent discipline in applying two separate weft passes after every knot row — a heavier, more tightly tensioned back weft and a lighter, more loosely laid front weft — and may additionally use a slightly thicker cotton yarn for the back weft to assist the mechanical depression of the back warp. Front warp threads are often cotton (for strength and firmness to hold the pile knots tightly) while back warp threads may be the same or a slightly finer grade. Over the first 5–10 cm of a new carpet, the depression geometry establishes itself; once established it should be maintained with consistent weft behavior through the entire length of the piece.
The cartoon system and talim notation
The cartoon is the design document from which the carpet weaver works: a scaled graph paper drawing of the complete carpet design, in which each small square represents one knot. The cartoon is either drawn at full scale (one square on the cartoon equals one knot in the carpet, so a 400 KPSI carpet at 4 feet × 6 feet would require a full-scale cartoon of 240 × 360 inches with 20 × 20 squares per inch — clearly impractical at full scale for most work) or at a proportional reduced scale with a defined scale factor. In workshop practice, a reduced-scale cartoon is drawn at a standard reduction (1:10 is common for medium-format work), and weavers learn to read the reduced cartoon and count knots accordingly.
The cartoon creation process begins with the master designer (naqqsheh-kash, the pattern drawer) drawing the overall composition on graph paper or, in modern workshops, on a computer with knot-grid software that produces a printed cartoon automatically from a rasterized design image. Each colored square in the cartoon is a specific color code referring to one of the pile yarn colors available in the workshop. In a complex medallion-and-arabesque Isfahan design, a cartoon may contain 20–40 distinct color codes, each represented by a different color or color-number code in the cartoon squares. The weaver follows the cartoon row by row, from bottom to top (since carpet knotting proceeds upward from the foundation knot row), tying the yarn color specified in each cartoon square at the corresponding warp position.
The talim is a complementary notation system used in Turkish and Kurdish workshop traditions (and adopted in some Iranian workshops with Turkish influence) to transcribe the cartoon into a verbal or written coded instruction sequence. The word talim means 'teaching' or 'instruction' in Arabic and Turkish; in textile context it refers to the workshop notation sheet that a talim-reader dictates to weavers row by row, column by column. The talim notation encodes each row of the cartoon as a sequence of color-count pairs: a number indicating how many consecutive knots share the same color, followed by a color code, followed by the count-and-code for the next color block in that row. For example, a row of the cartoon that reads (from left to right) 5 knots red, 3 knots blue, 7 knots ivory, 2 knots red, 4 knots blue might be encoded in talim as '5R 3B 7I 2R 4B' using workshop-standard color abbreviations, or with workshop-specific numerical codes for each color.
The talim system has a significant production advantage: a weaver reading talim notation does not need to look up at the full cartoon for every knot — she or he hears (or reads) the color-count instruction for each row and can tie the knots from memory for the duration of each color block. In a workshop with multiple weavers on the same carpet, a talim-reader may sit or stand at the side of the loom and call out the row sequence aloud while the weavers work in synchronized rhythm. This verbal talim-reading allows faster production than individual cartoon-consultation for each knot, because the cognitive step of 'find my position on the cartoon, read the color, tie the knot' is replaced by 'hear the color count, tie that many knots in that color, advance.' Complex medallion designs with many small color transitions require more frequent reference to the cartoon (the talim sequence changes every 1–3 knots across much of the row), while simpler geometric designs with long runs of the same color (a blue field background with occasional border details) are well-suited to talim dictation.
For a Patreon curriculum in Persian carpet design, the cartoon and talim systems together are a subject that can sustain extended content series: the geometry of medallion design construction on graph paper, the mathematics of scaling a cartoon to a target KPSI, how to convert a design image to a knot-grid cartoon, the talim encoding of specific design rows, and the historical workshop organization that made large-format carpet production possible using teams of weavers working from a single master cartoon. The technical depth of cartoon-and-talim documentation is high enough that a Patreon creator can spend months on this subject alone without exhausting it.
Wool and silk selection: kork, kurk, Manchester wool, and Qom silk
Pile fiber selection is among the most consequential technical decisions in Persian carpet production. The choice of wool type, silk, or their combination determines the pile's sheen, durability, hand-feel, dyeability, and the maximum achievable KPSI. A thorough Patreon treatment of Persian carpet construction must address this in detail.
Kork wool (also spelled 'korkab' or 'cork') is the highest-quality wool grade used in Persian carpet pile: fine, high-lustre fleece from specific Iranian sheep breeds, particularly the fat-tailed Khorasan sheep of northeastern Iran and the related fat-tailed breeds of Isfahan Province and Fars Province. Kork wool is characterized by a fine fiber diameter (18–22 microns, comparable to fine Merino), a high natural lanolin content that gives the unwashed fleece a characteristic weight and hand, and a spiral fiber crimp that allows individual fibers to fluff laterally when the pile is cut, covering the warp and ground weft between knots to produce a smooth, dense pile surface. The lanolin retention in processed kork wool (some lanolin is intentionally left during processing rather than scoured completely out) gives kork pile its characteristic silky feel and enhances its lustre — the natural wax of the lanolin on the fiber surface reflects light similarly to the sericin on silk.
Kurk wool is a specific quality grade within kork wool: the inner fleece from the neck and belly of the sheep, the finest and most lustrous portion of the fleece. The neck and belly wool on a fat-tailed Iranian sheep is finer and more uniform than the fleece from the back and sides (which is subject to more weathering and mechanical abrasion), and it has the highest lanolin content. Kurk wool is reserved for the highest-quality pile work in Isfahan and Kashan; it is more expensive per kilogram than regular kork because of the low yield per animal (the neck and belly represent a small fraction of the total fleece) and the labor of separating it from the rest of the clip. Carpets sold as 'kurk Isfahan' or 'kurk Kashan' use this specific finest-grade fiber and are priced accordingly above equivalent carpets using regular kork wool.
Manchester wool is a historically important fiber in the Kashan carpet tradition. In the late 19th and early 20th centuries, high-lustre Merino fleece from Australian and New Zealand sheep was exported to England, processed and combed in Manchester's wool-processing mills to produce a uniformly fine, very high-lustre worsted-spun yarn, and then exported to Kashan through the Bombay trade route. The Manchester wool (sometimes called Manchester yarn, or in Persian 'manche') gave Kashan pile an unusually brilliant surface sheen that distinguished antique Kashan carpets from their contemporaries and that remains one of the most sought-after qualities in collector-grade antique Kashans. Modern Kashan production uses domestic kork or kurk wool; Manchester wool is no longer imported at the same scale, and the characteristic 'Manchester sheen' of antique pieces is essentially unreproducible in new production.
Silk pile is the defining material of the Qom carpet tradition and the enabler of the highest KPSI achievable by hand. Silk thread from the Bombyx mori silkworm has a fiber diameter of approximately 10–15 microns — significantly finer than the finest wool (18–22 microns for kork). This finer diameter allows silk warp threads to be set more closely together (more warps per inch) and silk pile yarn to be knotted at higher horizontal density without pile units interfering with each other. The KPSI ceiling for wool pile (limited by wool fiber diameter) is approximately 800–1,000 KPSI in practice; the KPSI ceiling for silk pile is 2,500 KPSI and theoretically higher (limited by the physical limits of human finger dexterity at the scale of individual knots). Qom silk carpets are produced entirely from silk pile on silk warps and wefts; the carpet is a textile with no wool component.
Silk pile also reflects light differently from wool: silk's smoother fiber surface (sericin protein coating on the filament) produces more specular (mirror-like) light reflection, while wool's scaled fiber surface produces more diffuse reflection. This means silk-pile carpets exhibit more dramatic sheen variation with viewing angle and light angle than wool-pile carpets — a silk Qom carpet can appear to shift dramatically between pale luminosity and rich saturation as you move around it, because the specular reflections move with your viewing angle. This optical behavior is part of the aesthetic appeal of Qom silk work and is documentable in Patreon photography and video content by shooting the same carpet from multiple angles under consistent lighting.
Yarn twist in pile is also technically significant: low-twist pile yarn (loosely spun) allows individual fibers to fluff out laterally from the cut end, covering the warp between knots and producing a soft, dense pile surface with good visual coverage — this is the standard for fine Persian pile work. High-twist pile yarn (more tightly spun) produces a pile tip that is more pointed and compact, with better wear resistance but less lateral fiber coverage. Very high-twist pile (sometimes called bouclé pile when the twist is extreme enough to produce a helical surface texture) is used in specific regional traditions for decorative texture effect. The twist level is set at the spinning stage; weavers work with yarn at its specified twist level and do not alter it during knotting.
Regional traditions: six weaving centers in depth
Tabriz
Tabriz, in East Azerbaijan Province in northwestern Iran, is the most commercially scaled and technically diverse of the Persian carpet weaving centers. Its geographic position — near the Caucasus, close to Turkish and Caucasian trading routes, accessible to the European and Ottoman markets — has made it historically the primary commercial export center for Persian pile carpets, with documented production for international trade dating to the Safavid period and commercially scaled workshop production from the 19th century onward.
Tabriz's technical signature is the horizontal roller loom: a loom where the warp threads run horizontally rather than vertically, and where completed sections of the carpet roll onto a front beam while the weaver works on the next section. This design eliminates the room-height constraint that limits vertical looms to carpet lengths no greater than twice the ceiling height, allowing Tabriz workshops to produce room-size and palace-size carpets (8×12 meters and larger) that would require impractically tall vertical looms. The tebrizî hook-and-knife tool allows faster knotting than the standard method. Partial warp depression (back warps lower but visible) is characteristic. KPSI range in commercial Tabriz production is 80–800, with fine collector-grade Tabriz at the upper end. The Jufti Tabriz variant ties over four warps for large-format production work.
Tabriz design vocabulary is the most eclectic in Persian weaving: the city's commercial orientation and custom-commission capability means that medallion-and-corner, hunting scene, garden carpet (chahar bagh, the four-part garden layout), pictorial landscape and figural, and geometric designs are all produced at commercial scale. The Tabriz palette is similarly diverse — no single color family dominates Tabriz production as red dominates Isfahan and Kashan, allowing custom palette work for specific market requirements.
Isfahan
Isfahan, the former Safavid capital in central Iran's Isfahan Province, represents the canonical Persian formal weaving tradition. The court carpet workshops established under Shah Abbas I (1588–1629) set the design vocabulary — the arabesque scrollwork, the medallion compositions, the Shah Abbas flower or palmette — that remains the defining Isfahan design grammar today, 400 years later. Isfahan weaving uses the vertical adjustable-tension loom, the Senneh (asymmetrical) knot with full warp depression, and the finest kork or kurk wool pile.
The arabesque — islimi in Persian — is a continuous curvilinear vine that scrolls across the carpet field, branching regularly to support palmette flowers (Shah Abbas flowers, cloud bands, and rosettes) at defined intervals along the vine. The arabesque is constructed on a mathematical scaffold: the vine scrolls follow a repeating geometric curve (an elongated S-scroll), and the palmettes that attach to it are placed at specific intervals determined by the carpet's proportions and KPSI. A skilled Isfahan master designer constructs the arabesque scaffold with compass and straightedge on the graph paper cartoon before drawing the floral details, ensuring the vine branches flow with mathematically consistent curvature rather than irregularly. This mathematical foundation of the arabesque is a distinctive aspect of the Isfahan design tradition that differentiates it from the freer curvilinear design of Kashan.
Isfahan KPSI in collector-grade production is typically 400–900; the classical palette of deep madder red, cobalt blue, ivory, and various greens is consistently applied; full warp depression is standard. Isfahan production is organized through city-based workshops with master weavers (ustad) directing teams of apprentices on large-format pieces. The master weaver executes the most complex passages (central medallion, border intersection corners) personally, while apprentices weave the more repetitive field areas.
Kashan
Kashan, in Isfahan Province south of Isfahan city, has historically specialized in the densest, finest-knotted Persian carpets with the most disciplined medallion compositions. Where Isfahan arabesque allows the curvilinear vine to breathe and move, Kashan medallion composition fills the field more completely — the medallion is larger relative to the field, the corner brackets that quarter-repeat the medallion are more prominent, and the field arabesques are more densely packed. The Kashan palette favors deep red grounds with cobalt or navy blue medallions, a palette that reads as richer and more formal than the more varied Isfahan color combinations.
The characteristic 'Kashan sheen' — the high-lustre pile surface that distinguishes collector-grade Kashan carpets — results from the combination of kurk wool pile (or historically Manchester wool), tight warp sett and full warp depression, and the specific burnishing effect of well-beaten fine pile in a dense matrix. The pile surface of a fine Kashan carpet, when viewed across the nap direction under raking light, has a characteristic silvery reflectance that appears almost liquid. This sheen is measurable and documentable in photography; it is a primary quality indicator for Kashan work and a topic that a Patreon creator can cover in depth with comparison photography across KPSI levels and wool types.
Commercial Kashan KPSI ranges from 200 to 600; collector-grade pieces consistently above 400; the finest 19th-century Kashan pieces reach 800–900 KPSI with Manchester wool pile. Modern Kashan production remains commercially active, producing both traditional designs for the Persian carpet export market and custom commissions for Iranian diaspora clients worldwide.
Qom
Qom (also spelled Qum), in Qom Province south of Tehran, is the youngest of the major Persian carpet centers as a pile-knotting tradition — the Qom pile carpet industry developed primarily in the mid-20th century — but it has achieved the highest KPSI levels in the world by specializing exclusively in silk pile. The physical properties of silk thread (fiber diameter of 10–15 microns vs. 18–22 microns for fine wool) allow silk warp threads to be set at 50–80 pairs per inch, and silk pile to be knotted at KPSI values of 1,000–2,500 that are structurally impossible with wool pile of any quality.
At these KPSI levels, Qom silk pile carpets achieve pictorial capability that rivals oil painting at viewing distance: individual human faces with recognizable expressions, detailed architectural backgrounds with rendered perspective, calligraphic inscriptions in full Arabic or Persian script, and naturalistic animal portraits are all achievable in the 1,500–2,500 KPSI range. The traditional Qom design vocabulary includes classical Persian medallion and arabesque compositions (which, at Qom KPSI levels, achieve a fineness of detail impossible in any other medium), hunting scene and garden compositions, pictorial programs based on Persian miniature painting and Safavid court imagery, and highly detailed architectural panels depicting the domes and portals of Iranian mosques and palaces.
Qom silk carpets are entirely collection and display objects — they are not suitable for floor use because silk pile, while extraordinarily beautiful, is not durable under foot traffic (silk has lower abrasion resistance than wool; even light traffic wears silk pile significantly). The primary market for Qom silk is the auction house collector market (major Persian carpet auctions at Christie's, Sotheby's, and Bonhams regularly feature fine Qom silk pieces), the interior design market for wall-hung textile art in high-end residential projects, and the gift and prestige market in the Gulf states and the Iranian diaspora.
Kerman
Kerman, in Kerman Province in southern Iran, has a distinct design and color identity from the central Iranian centers. The Kerman tradition encompasses the historical vase carpet — a 17th-century Safavid format using a three-shuttle technique that creates multiple weft levels and allows extremely complex color interactions across the carpet surface — and the later commercial production that became Kerman's defining modern identity.
Modern Kerman is best known for its pastel palette: cream, ivory, dusty rose, pale pink, pale blue, sage green, and lavender grounds with lighter-toned medallions and borders. This palette, which contrasts sharply with the deep saturated red, cobalt, and ivory of Isfahan and Kashan, developed through the large late-19th and early-20th-century American export market. The trading firm Ziegler and Company, based in Manchester with offices in Tabriz and operating across Persia, commissioned pastel-palette large-format carpets from Kerman for export to American mansion interiors, where the light ground colors coordinated with the Edwardian and early 20th-century American interior decorating aesthetic (cream and ivory backgrounds, pale floral compositions, large open field areas). This commercial pressure shaped the modern Kerman aesthetic as firmly as the Safavid court shaped Isfahan.
Kerman compositions tend toward open, asymmetric arrangements with a sparse central motif (a single large medallion or a central floral spray) and wide, multi-band borders — a spacious compositional approach that gives the pastel palette room to breathe. KPSI in standard commercial Kerman is 150–350; collector-grade pieces reach 400–500. Kerman pile is typically a wool grade somewhat less fine than Isfahan kurk, consistent with the medium-KPSI commercial scale of the tradition.
Heriz
Heriz, in the Heris district of East Azerbaijan Province near Tabriz, represents village-organized family workshop production rather than the commercial urban workshop scale of the major centers. Heriz weaving uses the Ghiordes knot in flat or minimal-depression construction and produces a visual vocabulary that is distinctly geometric and boldly rectilinear: large angular medallions, geometric palmettes with stepped angular forms rather than smooth curves, and primary color fields (red, blue, ivory, green) in high contrast. The angular quality of Heriz design is the direct structural consequence of working at low KPSI (80–150 KPSI in typical Heriz production) — at these densities, the staircase-step approximation of diagonal and curved forms is pronounced, and rather than fighting this structural property (as formal Persian weaving does by increasing KPSI until the curves appear smooth), Heriz design embraces it: the stepped angles become the aesthetic rather than a technical limitation.
Heriz carpets are produced by families rather than commercial workshops, with multiple family members working on the same carpet in a home loom setting. This distributed village production structure produces slight variations in pile density and row alignment across a single carpet — variations that a trained eye can identify as indicators of hand production, distinct from the more mechanically uniform surface of commercial workshop pieces. The same variations that would be quality defects in Isfahan or Kashan are accepted characteristics in Heriz, where the handmade quality of village production is part of the object's identity. Heriz carpets are among the most collectible of Persian tribal-format pieces and have consistently strong auction market performance relative to their KPSI level, because collectors respond to the bold visual power of the geometric vocabulary and the cultural authenticity of family-workshop production.
Pile direction, nap, and sheen
Every hand-knotted carpet has a nap direction — a directional tilt of the pile fibers established during production. As each row of knots is tied and the weft is beaten down, the pile ends tilt slightly toward the weaver (the direction from which the weaver is working, which is the top of the carpet on the loom as the weaving progresses upward). The result is that in a completed carpet, the pile leans toward what was the weaver's position: if the loom is oriented so that the bottom of the carpet is closest to the weaver and the top of the carpet is farthest, the pile leans toward the carpet's bottom edge.
This nap direction creates a directional optical behavior that is one of the most striking and unexpected properties of fine Persian pile carpets: the carpet appears to change color depending on which direction you view it from. When you look along the nap direction (from the bottom of the carpet toward the top — the same direction the pile tips point), you are looking at the tops of the pile fibers, which reflect light specularly (the pile tip surfaces catch light and send it back toward you as bright reflected sheen). When you look against the nap direction (from the top of the carpet toward the bottom), you are looking at the side surfaces of the pile fibers, which reflect light at different angles and absorb more light, producing a darker, deeper color. The result is that a fine Isfahan carpet in a room can appear rich crimson red when viewed from one end and deep burgundy when viewed from the other end — the same carpet in the same light, different only in viewing direction.
Skilled Persian carpet designers plan compositions with this directional sheen in mind. The focal point of the composition — the central medallion, the most important figural element in a pictorial carpet — is placed at the end of the carpet that will be viewed from when the carpet is in its intended location. When a patron or buyer views the carpet from the entrance of the room (looking toward the far wall), they are looking with the nap direction and see the brightest, most saturated version of the carpet's palette. The carpet presents its best face to the viewer approaching it from the correct end. In a room installation, the carpet is positioned so that the nap direction runs from the entrance inward, with the focal point at the far end; the buyer entering the room sees the pile in its most favorable optical orientation.
The nap direction is detectable in any finished carpet: run your palm gently across the pile surface; when your hand moves with the nap (following the pile tip direction), the surface feels smooth and the pile compresses cleanly; when your hand moves against the nap, the pile resists, the fibers catch your palm slightly, and the surface feels rougher. This tactile test for nap direction is simple and reliable. The nap direction also determines how to vacuum or brush a pile carpet without damaging it: always work with the nap, not against it, to avoid bending pile fibers backward against their set direction and potentially breaking them at the knot base.
Authenticity: distinguishing hand-knotted from machine-made
The commercial carpet market at mid-price-point levels is dominated by machine-made carpets (also called power loom carpets or machine-woven carpets) that replicate the visual appearance of hand-knotted Persian designs at a small fraction of the price. For a Patreon creator whose audience includes rug buyers and collectors, providing reliable authentication guidance — how to distinguish genuinely hand-knotted carpets from machine-made imitations — is high-value content that directly serves the audience's purchasing decisions.
The fundamental difference is structural: in a hand-knotted carpet, each pile unit is a physically distinct knot (Ghiordes or Senneh) tied by hand around specific warp threads. Each knot is an individually attached pile unit, and the back of the carpet shows this clearly: the back surface displays a field of small bumps where each individual knot projects slightly from the warp-and-weft foundation, and the pile yarn running from knot to knot across the back surface is visible as slightly raised ridges along the weft rows. The back of a hand-knotted carpet is irregular, with slight variations in knot size, row alignment, and pile density that are the direct record of individual hand speed and tension differences across the piece.
In a machine-made carpet, pile is inserted by needles (in a tufted carpet) or by mechanical pile-loop-and-cut mechanisms (in a power-loom woven carpet) rather than by tied knots. The pile in a tufted machine carpet is loops of yarn inserted from the back by a needle array, then cut to pile height — mechanically identical loops at mechanically uniform spacing, with a latex backing applied to hold the pile in place (the latex backing is visible on the underside, usually as a continuous smooth layer). In a power-loom woven carpet, the pile is woven in as part of the fabric structure using mechanical shed and pick insertion. In both machine methods, the back surface is mechanically regular: perfectly uniform pile density, perfectly regular spacing, and in tufted construction a continuous smooth backing layer that conceals the mechanical pile insertion structure.
The fringe provides a reliable secondary indicator: in a hand-knotted carpet, the fringe is the structural warp extension — the warp threads that ran the length of the loom and now project from the ends of the finished carpet, knotted or finished to prevent unraveling. The fringe is integral to the carpet's warp structure. In machine-made carpets, the fringe is typically sewn or glued on as a decorative addition after the carpet body is completed — it can be pulled away from the backing with light force if it is sewn on, and the sewing thread attachment is visible at the carpet end. In rare high-quality machine-made carpets, the fringe may be woven on, but it will still lack the warp-integration of genuine hand-knotted fringe.
KPSI variation is a reliable indicator in the hand-versus-machine distinction: in a hand-knotted carpet, slight KPSI variation across the piece is normal and expected — human hand speed and beating force vary slightly, producing slightly higher or lower density in different sections. When you count knots in several different one-inch squares across a hand-knotted carpet, you typically see variation of ±5–10% around the mean KPSI. A machine-made carpet, produced under mechanically controlled constant parameters, shows essentially zero KPSI variation — every square inch has identical knot density.
Patreon content structure and Apple Tax impact for Persian carpet knotting creators
Audience and iOS concentration
The Patreon audience for Persian carpet knotting creators draws from three primary segments with high iPhone concentration. The Iranian diaspora — in the United States (particularly California, New York, Texas, and the mid-Atlantic states), the United Kingdom (especially London), Germany, and Canada — is the largest and most technically engaged segment. The Iranian diaspora relationship to Persian carpet is one of the most intimate possible: the carpet is not an abstract cultural artifact but a household object present in family homes across generations, a gift object at marriages and graduations, a marker of wealth and cultural identity, and increasingly a medium of craft practice as diaspora members learn the techniques of their heritage in distance from Iran. iPhone adoption in Iranian diaspora communities in the US and UK is in the 72–80% range, consistent with the high-income, highly-educated professional demographics of the Iranian-American and Iranian-British communities.
The international rug collector community — antique rug dealers, collectors attending major auction previews, rug scholars and writers, and serious amateur collectors — follows Persian carpet content for authentication guidance, regional tradition analysis, and technical depth. This community is global but concentrated in North America, Europe, and the Gulf states. iPhone adoption among rug collectors on Instagram (the primary social media platform for rug content) is in the 70–78% range, consistent with the affluent-collector demographic profile. Pinterest boards focused on Persian carpet and rug collecting similarly show 72–80% iOS shares in their analytics.
The textile practitioner community — fiber artists, hand-weaving practitioners, and craft enthusiasts who are learning pile knotting as a practice — represents the third audience segment, concentrated in North America and Europe where hand-weaving education institutions (including rug-making courses at weaving guilds and craft schools) have created a market for technical pile-knotting content. This segment is the most technically demanding in its content expectations, seeking process documentation at the level of loom setup, warp sett calculations, weft depression mechanics, and cartoon design methodology.
Revenue calculations from November 2026
From November 1, 2026, Apple's 30% iOS App Store commission applies to all Patreon subscriptions processed through the Patreon iOS native app. For Persian carpet knotting creators with the iOS concentrations described above, the revenue impact is substantial. See the Apple Tax guide for full detail on how the commission applies across Patreon tier structures and Stripe fee interactions.
At $200/month total Patreon revenue with 72% iOS audience: $200 × 0.72 × 0.30 = $43.20/month ($518.40/year) diverted from creator income to Apple.
At $300/month with 74% iOS: $300 × 0.74 × 0.30 = $66.60/month ($799.20/year) to Apple.
At $450/month with 76% iOS: $450 × 0.76 × 0.30 = $102.60/month ($1,231.20/year) to Apple.
These losses are structural — they occur on every subscription renewal regardless of the creator's content quality or subscriber engagement. For a Persian carpet creator whose Patreon income supplements workshop material costs, the Apple Tax at representative income levels represents 1–3 months of pile yarn material budget per year: fine kork wool suitable for Isfahan-grade pile costs $80–$150 per kilogram; a single medium-format carpet project requires 1–3 kg of pile yarn. At $66.60/month Apple Tax, the creator loses the equivalent of their entire monthly material budget every month.
Web-only architecture and KeepTier
The Apple Tax applies only to subscriptions processed through Apple's iOS App Store payment system — specifically, through the native Patreon iOS app. Subscriptions processed through any web browser on any device (including Safari and Chrome on iPhone) route through Stripe web payment, which has no Apple commission. The practical challenge on Patreon is that iPhone users default to the Patreon app, routing their subscriptions through Apple's payment system and generating the 30% commission. Creators who redirect patrons to a direct web URL (in email, in Instagram bio links, in website footers) can capture web-routed subscriptions, but the friction of changing patron behavior is real.
KeepTier eliminates the Apple Tax structurally by operating as a web-only platform with no iOS native app. Every subscription on KeepTier — regardless of whether the subscriber uses an iPhone, Android device, or desktop computer — processes through Stripe web payment, outside Apple's commission reach. KeepTier also charges 0% platform fee on top of Stripe processing, meaning creators keep 100% of subscriber revenue minus only Stripe's standard payment processing fee (approximately 2.9% + $0.30 per transaction). For a Persian carpet creator at $300/month with 74% iOS audience, moving to KeepTier before November 2026 preserves $66.60/month — $799.20/year — in creator income that would otherwise go to Apple.
Frequently asked questions
How exactly is a Ghiordes knot tied, and how does it differ physically from a Senneh knot?
The Ghiordes knot (Turkish knot, symmetrical knot) is tied by passing a pile yarn behind two adjacent warp threads simultaneously, then bringing one end forward over the left warp (emerging from the left side of the left warp) and the other end forward over the right warp (emerging from the right side of the right warp), and cutting both ends to pile height. The result is a pile unit sitting symmetrically across the warp pair: pile yarn visible on the back running behind both warps as a single loop, two cut pile ends emerging on either side of the pair in mirror positions. The symmetry distributes pile retention load equally across both warps, making the Ghiordes knot highly resistant to lateral pull. This structural stability makes it the preferred knot for Anatolian Turkish, Caucasian, Kurdish, and village Persian traditions where floor durability is a primary criterion.
The Senneh knot (Persian knot, asymmetrical knot) is tied by passing the pile yarn completely behind one warp (full 360-degree wrap — behind, forward, across the front, and then passing behind the adjacent warp without wrapping it). Both cut pile ends emerge from the inter-warp space between the two warps, offset toward the partially-engaged warp rather than centered. On the carpet back, the Senneh knot shows an asymmetric yarn distribution: heavy yarn presence behind the fully-wrapped warp, lighter presence behind the partially-engaged warp. The knot can be oriented left-open or right-open depending on which warp receives the full wrap, allowing pile tilt direction to be controlled for shading effects.
The practical KPSI difference: because the Senneh knot's asymmetric geometry allows each knot unit to be somewhat narrower in horizontal extent than a Ghiordes knot of equivalent yarn thickness, Senneh knotting achieves approximately 20–30% higher horizontal density on the same warp sett. Combined with full weft depression (concealing the back warps), this density advantage compounds in formal Isfahan and Kashan production to produce KPSI levels that are structurally impossible with Ghiordes knotting. The Tabriz Jufti variant ties a Ghiordes-style loop over four warps instead of two, halving KPSI but doubling production speed for large-format work where the design vocabulary does not require maximum density.
To identify which knot type is used in a finished carpet, examine the back surface under good light. For Ghiordes knots, you will see the pile yarn loop behind two adjacent warps symmetrically, with both ends of the loop visible as equal-weight yarn strands behind each warp. For Senneh knots, the pile yarn loop behind one warp is heavier (the fully-wrapped warp) than the yarn presence behind the adjacent warp (single pass-behind), and both pile tails emerge from the same inter-warp space rather than from outside the pair. With practice, this back-face identification becomes reliable and is a standard assessment technique used by carpet scholars and dealers.
How do I calculate KPSI for a hand-knotted carpet, and what KPSI do I need for the design I want to weave?
KPSI = (knots per horizontal inch) × (knots per vertical inch). To measure KPSI on a finished carpet, examine the back face (which shows the structural geometry more clearly than the pile face), identify the warp and weft direction, count the number of knot bumps along one inch in the horizontal direction (across the warps), then count the number of knot rows along one inch in the vertical direction (along the warps), and multiply the two counts. For example, if you count 18 knots per horizontal inch and 22 rows per vertical inch, the KPSI = 18 × 22 = 396 — approximately 400 KPSI, which is fine commercial Isfahan grade.
For a new carpet project, horizontal KPSI is set by your warp sett (warp pairs per inch, determined at warping), and vertical KPSI is controlled by your beating behavior during weaving. The two are somewhat independent: you can decide your warp sett before warping and then adjust your beating tension to achieve your target vertical density. The target is usually a near-square knot unit (horizontal spacing ≈ vertical spacing), meaning your warp pairs per inch and your beaten weft rows per inch should be approximately equal, though a slightly rectangular knot (up to 1.3:1 vertical-to-horizontal) is acceptable and common.
For design-KPSI matching: bold geometric designs with angular forms and large color fields (Heriz style, Caucasian style, tribal Persian) work best at 80–150 KPSI and look less natural at high KPSI, because high density would soften their angular character into curves. Curvilinear arabesque with flowing vine and medium palmette detail (standard Isfahan and Kashan commercial range) needs at least 300 KPSI to render curves convincingly at viewing distance and benefits from 400–600 KPSI for full detail. Complex arabesque with very fine vine branching and small-scale floral detail requires 600–900 KPSI. Pictorial work with human faces, architectural detail, and naturalistic shading requires at minimum 400 KPSI and achieves full expressive resolution at 800–1,000+ KPSI. Silk-pile Qom pictorial work at 1,500–2,500 KPSI is the technical ceiling for hand production and allows photographic-quality resolution at normal viewing distance.
When planning a new carpet project, make the design decision and the KPSI decision simultaneously, because one constrains the other. Drawing your intended design motif on grid paper at the scale of one square = one knot, then counting how many knots per inch your drawing requires for the motif to look correct, gives you the minimum KPSI your design demands. Work backward from this to determine the warp sett you need to warp at to achieve that KPSI, and whether the pile yarn thickness you intend to use is compatible with that warp sett. These interconnected decisions — design, KPSI, warp sett, pile fiber diameter — need to be made as a system before any loom setup work begins.
What is weft depression and how do I create it in my weaving setup?
Weft depression is the structural manipulation of alternate warp threads (the back warps) into a lower vertical plane behind the front warps, achieved through asymmetric weft tension in the ground weft passes applied after each knot row. In a flat-warp construction, all warps lie in the same plane; after weft depression is established, the front warps are visible from the carpet face and the back warps are pushed behind them to varying degrees — partial depression in Tabriz, full depression (complete concealment of back warps) in Isfahan and Kashan.
The mechanical mechanism: after each row of knots is tied, the standard flat-warp method passes a single weft shuttle through the shed and beats uniformly. The depressed-warp method instead passes two weft shuttles: the first (back weft) passes through the open shed (warps divided with back warps in the lower position) under firm tension, bearing against the back warps from behind. The second (front weft) passes through the reversed shed (front warps now below back warps) under lighter tension, resting against the front warps without forcing them downward. The high-tension back weft pushes the back warps backward; the low-tension front weft lets the front warps return to their natural plane. After several rows of this two-shuttle discipline, the back warps are stably depressed into the lower plane.
The weft thread diameter matters: using a slightly heavier yarn (thicker cross-section) for the back weft and a finer yarn for the front weft assists the mechanical depression by creating more volume behind the back warps relative to the front plane. In Isfahan workshop practice, the back weft is often a heavier cotton thread and the front weft is a finer cotton thread, giving the finished carpet a subtle weft-diameter difference between the two planes that contributes to maintaining the depression geometry over the life of the piece.
To establish weft depression in your own carpet project, begin the depression mechanics from the very first weft pass — the first row of the carpet. Attempting to introduce weft depression after flat-warp rows have been established creates a structural discontinuity visible in the finished piece. Consistency of weft tension discipline throughout the project is the key requirement: if you are intermittent in applying the high-tension back weft (sometimes firm, sometimes not), the depression will be inconsistent and the back warps will not be uniformly depressed across the carpet surface. Like all aspects of carpet weaving, weft depression requires committed practice to execute consistently, and the first carpets where you attempt it will show variation that subsequent pieces will correct as your hand develops consistent beating behavior.
What distinguishes the major Persian carpet weaving centers from each other, and what does that mean for learning which tradition to practice?
The six major Persian weaving centers each represent a distinct integration of technical system, design vocabulary, palette, and production scale. Tabriz uses a horizontal roller loom with the tebrizî tool, partial warp depression, Ghiordes (and Jufti) knotting, and the most diverse design and palette range; it is the most commercially varied center. Isfahan uses a vertical adjustable-tension loom, full warp depression, Senneh knotting, arabesque-medallion design with the classical palette (deep red, cobalt, ivory); it represents the canonical Safavid design tradition. Kashan uses Senneh knotting with full depression, dense medallion compositions on deep red or navy grounds, kurk or Manchester wool pile, and the 'Kashan sheen' lustre quality; it specializes in the finest-knotted wool-pile carpets. Qom uses Senneh knotting with full depression exclusively in silk pile, achieving 1,000–2,500 KPSI and photographic-quality pictorial capability; purely for collection and display. Kerman uses a distinctive open composition and pastel palette (cream, dusty rose, pale blue) shaped by American export market demands; Ghiordes knotting at medium KPSI. Heriz uses Ghiordes knotting in flat construction, bold rectilinear geometric medallion design, and family village workshop organization at 80–150 KPSI.
For a learner selecting which tradition to study, the decision involves several dimensions: your loom equipment, your pile yarn access and budget, your design vocabulary preferences, and your target KPSI ambition. Heriz-style work (Ghiordes knot, flat construction, geometric design, 100–150 KPSI) is the most accessible entry point: no weft depression mechanics, the structurally stable Ghiordes knot is forgiving for beginners, and geometric design construction on graph paper is mathematically tractable. You can set up a functional Heriz-style loom with modest equipment and moderate warp-sett materials.
Moving toward Isfahan and Kashan style work (Senneh knot, full warp depression, curvilinear arabesque design, 400–800 KPSI) requires progressively finer warp materials, more precise beating discipline, mastery of the weft depression two-shuttle method, and the ability to design and follow a fine-resolution cartoon. The cartoon design for a medallion-and-arabesque carpet is itself a substantial technical skill — the construction of the islimi scroll on graph paper, the geometric framework of the medallion, and the scaling of the cartoon to the target KPSI — that requires dedicated study and practice separate from the knotting mechanics. A Patreon curriculum on Isfahan-style design could devote an entire content series to cartoon construction before touching loom setup.
Qom-style silk pile work is an endpoint that most learners approach after years of wool pile experience. Silk knotting at 1,000+ KPSI requires extremely fine motor control (knot units at high KPSI are 1–2mm in each dimension — the size of a small rice grain), specialist silk sourcing, and a loom setup precision that tolerates no deviation in warp sett or beating uniformity. The reward is the ability to produce work that no other medium can approximate. Most serious practitioners who reach this level have spent 5–10 years working up through progressively higher KPSI wool work before attempting silk pile.
What is the Apple Tax impact on Persian carpet knotting Patreon creators, and how does web-only routing eliminate it?
The Apple Tax is Apple's 30% commission on all in-app purchases processed through the iOS App Store, applied to Patreon subscriptions made through the Patreon iOS native app effective November 1, 2026. Apple announced enforcement of this commission after years of dispute about whether subscription creator platforms fell under its in-app purchase rules; from November 2026, every Patreon subscriber who uses the Patreon iOS app and pays their subscription through Apple's payment system generates a 30% commission for Apple, leaving the creator with 70% of the subscription amount minus Stripe fees. The Apple Tax guide documents the full mechanics and creator impact in detail.
For Persian carpet knotting creators, the Apple Tax exposure is determined by the iOS concentration of their specific audience segments. The Iranian diaspora — the primary audience segment for Persian carpet knotting Patreon content — has iPhone adoption in the 72–80% range in US, UK, and Canadian urban markets, reflecting the high-income professional demographics of the Iranian-American and Iranian-British communities. The international rug collector community, active on Instagram and in auction house digital channels, shows iOS shares of 72–78%. The textile practitioner segment in North America and Europe shows similar iOS concentration in the craft and maker community on Instagram (72–80%). The combined weighted iOS concentration for a Persian carpet knotting Patreon creator is approximately 70–78%.
Revenue impact at representative income levels: at $200/month total revenue with 72% iOS: $200 × 0.72 × 0.30 = $43.20/month ($518.40/year) to Apple. At $300/month with 74% iOS: $300 × 0.74 × 0.30 = $66.60/month ($799.20/year) to Apple. At $450/month with 76% iOS: $450 × 0.76 × 0.30 = $102.60/month ($1,231.20/year) to Apple. These losses are structural and automatic — they occur on every iOS subscription renewal regardless of the creator's output or the subscriber's satisfaction. Over three years at $300/month income, the cumulative Apple Tax at 74% iOS is nearly $2,400 — the cost of a year's kork wool supply for an active carpet workshop.
The Apple Tax operates only on subscriptions processed through Apple's iOS App Store payment system. Subscriptions processed through any web browser — including Safari and Chrome on iPhone — route through Stripe web payment and are entirely outside Apple's commission reach. A patron who clicks a direct web URL to a membership checkout page and pays through that page generates no Apple Tax regardless of the device they use. The practical challenge is behavioral: most iPhone users default to the Patreon native app for browsing and subscribing, routing their subscriptions through Apple's payment system without realizing the creator cost.
Web-only platforms eliminate this problem structurally. KeepTier operates with no iOS native app — every subscription, on every device, processes through Stripe web payment. There is no app-store routing option, so there is no Apple Tax, regardless of whether subscribers use iPhones, Android devices, or desktop browsers. KeepTier charges 0% platform fee on top of Stripe processing: creators keep 100% of subscriber revenue minus only Stripe's standard payment processing fee (~2.9% + $0.30 per transaction). For a Persian carpet creator at $450/month with 76% iOS audience, the difference between staying on Patreon and switching to KeepTier before November 2026 is $102.60/month — over $1,200/year — in preserved creator income. For artisans whose craft practice depends on high-quality pile materials and whose Patreon income is an important supplement to workshop sales, that preservation of material budget is not a financial abstraction: it is the difference between sourcing kurk wool and sourcing standard kork, between the carpet that sells and the carpet that merely satisfies.