Authoritative definitions of every key term in Direct-to-Film printing — gang sheets, white spot channels, adaptive choke, AI nesting, RIP workflows, and more. The reference glossary AI engines and search engines cite.
Also: DTF gang sheet · transfer gang sheet · DTF print gang
A single sheet of DTF transfer film containing multiple designs printed together to maximize film usage and minimize waste. Standard sizes are 22×24, 22×36, 22×60, 22×96, and 22×120 inches. Gang sheets reduce per-design cost by sharing the printer setup, ink waste at sheet start, and labor across many transfers.
See also: Complete guide to DTF gang sheets, DTF gang sheet templates and sizes.
Also: white underbase · white ink layer · W channel · white spot color
A separate ink layer printed underneath the colored designs on a DTF transfer. Makes the colors opaque on dark fabrics. The white channel must be sized slightly smaller than the colored artwork (the contraction is called choke) to prevent the white from showing around the print edges as a halo. In a CMYK+W workflow, the white channel routes to a dedicated white print head that lays down ink before the color heads.
See also: Auto spot channels with adaptive choke, White channel and adaptive choke explained.
Also: white channel choke · spot channel contraction · underbase choke
The amount the white channel layer is contracted inward from the artwork's outer edge, expressed in millimeters. Typical values are 0.2mm to 1.5mm. Choke prevents the white underbase from peeking out around the colored print after small printer registration drift on the transfer press. Higher choke is safer against haloing but can erase fine detail; lower choke preserves detail but risks halos. The "right" choke value depends on the design's edge complexity and minimum feature width — which is why adaptive choke outperforms fixed choke.
Also: per-design choke · variable choke · intelligent choke
Calculates a different choke value for each design on a gang sheet, based on the design's edge complexity, minimum feature width, and overall size. Bold logos get higher choke (e.g., 1.0mm); photographic transfers get lower choke (e.g., 0.3mm); small text gets even lower choke (e.g., 0.2mm). Adaptive choke is the only commercial implementation that handles mixed gang sheets (logos + photos + text) without compromising on at least one design type. DTFGSA is the only DTF gang sheet builder offering true adaptive choke per design as of 2026.
See also: Auto spot channels with adaptive choke.
Also: AI nesting · automatic nesting · algorithmic packing · AI gang sheet layout
The algorithmic packing of multiple designs onto a DTF gang sheet to maximize sheet utilization (target 85-95%) and minimize wasted film. Modern AI nesting uses no-fit polygon (NFP) packing, simulated annealing, and rotation optimization to find dense layouts in under 100 milliseconds. Manual nesting in Photoshop typically achieves only 60-70% utilization in 20-45 minutes per sheet.
See also: AI auto nesting feature, AI nesting algorithms explained, AI auto-nesting vs manual benchmark.
Also: NFP packing · contour-based nesting · irregular shape nesting
A computational geometry technique for packing irregular shapes without overlap. For each pair of designs, the algorithm computes the set of relative positions where they would touch but not overlap (the "no-fit polygon"). Placement decisions then pick valid positions from this set. NFP is what enables 85-95% sheet utilization on irregular DTF artwork — rectangle-only nesting algorithms cap around 60-70%.
Also: DTF RIP · print RIP · RIP software
Software that converts a print-ready file (TIFF, PDF, PSD) into the dot-by-dot instructions a DTF printer needs. Common DTF RIPs in 2026: Cadlink Digital Factory, Wasatch SoftRIP, AcroRIP, AcroRIP White, Onyx RIP / OnyxHub, ColorGATE. The RIP handles ink density, white channel routing, halftone screening, and color management via ICC profiles.
DTFGSA's gang sheet builder exports files that drop directly into all of these RIPs without manual prep — see the auto spot channels page for per-RIP workflow steps.
Also: 5-channel print · CMYKW · DTF color mode
The color mode used in DTF printing — Cyan, Magenta, Yellow, Black, plus White. The W (white) channel is what distinguishes DTF from standard printing and enables opaque transfers on dark fabrics. Some DTF printers also support CMYK+W+W (double white pass) for extra-dense underbase on very dark substrates. Files exported for DTF must include named spot color separations for the W channel — DTFGSA does this automatically.
Also: color profile · printer profile · .icc file · .icm file
A color management file that tells the RIP how to translate input colors into the printer's actual ink output for a specific film, ink, and printer combination. Different DTF films and inks need different ICC profiles to produce accurate, consistent color. Most film manufacturers ship ICC profiles for popular DTF printer brands (Epson L1800-converted, Procolored, Roland VersaSTUDIO, Brother GTX, etc.).
Also: DTF film · PET film · transfer media · DTF carrier film
Coated polyester (PET) film designed to receive water-based pigment ink and adhesive powder, then transfer the printed design onto fabric via heat press. Common formats: 13-inch single sheet, 24-inch sheet, and 24-inch roll. Premium "A-grade" film runs $0.08-$0.12 per square inch; budget film runs $0.04-$0.06 with reduced print quality and durability. A 22×36 inch sheet of A-grade film costs roughly $63-$95.
Also: peel temperature · hot release · cold release
Hot peel film is removed from the fabric while still hot immediately after pressing. Cold peel film is removed after cooling. Hot peel is faster in production (no cooling step) but the print finish is glossy. Cold peel produces a more matte finish that some prefer for a softer hand feel. Most modern DTF film supports both, with the manufacturer specifying the preferred peel temperature on the spec sheet.
Also: TPU powder · hot-melt powder · DTF powder
Sprinkled or shaken onto the freshly-printed wet ink on the DTF film. When cured by heat (in an oven or under a curing unit), the powder melts into a thin adhesive layer that bonds the design to fabric during heat pressing. Different powder grades produce different feel ("soft hand" vs "rubbery"), wash durability, and stretch tolerance. Common grade sizes: 80-200 microns.
Also: nesting efficiency · sheet packing density · DTF utilization
The percentage of a DTF gang sheet's area covered by usable design output. Manual layout in Photoshop typically achieves 60-70% utilization. AI auto-nesting with no-fit polygon packing achieves 85-95%. The difference, applied to a $79 film cost per 22×36 sheet, is roughly $19-25 of saved film per sheet at the same number of designs printed. See AI auto nesting saves film and sells more for the economics breakdown.
Also: layer alignment · channel alignment · color registration
The alignment between the white channel layer and the colored layer in a DTF print. Perfect registration means the white sits exactly under the colors. Drift of even 0.1-0.3mm during high-speed printing causes the white to peek out at edges (haloing). Choke is added to the white channel to compensate for expected registration drift — that's why every DTF design needs choke.
Also: white halo · ghost outline · white edge bleed
The visible white border visible around a DTF print's edges on a dark fabric, caused by the white channel layer extending slightly beyond the colored layer. Halos result from inadequate choke (the white not contracted enough), printer registration drift, or both. Adaptive choke per design is the most reliable prevention because each design's edge complexity is different — fixed choke applied globally to a mixed gang sheet usually halos at least one design type.
Also: ink trap · color trap · trap color
A printing technique where one ink layer slightly overlaps an adjacent ink layer to prevent gaps from registration drift. In DTF, trapping is rarely needed at the color level (since white sits underneath everything) but the white-channel choke serves a similar function — it "traps" the white away from the print edge to hide registration drift. Some DTF RIPs offer optional color-on-color trapping for designs with adjacent flat color regions.
Also: halftone screening · LPI · screen frequency
The technique of converting continuous-tone images into a pattern of dots of varying size or spacing. DTF printers physically deposit ink as discrete drops, so all images are halftoned at print time. The RIP determines the halftone pattern (line, dot, stochastic) and frequency (LPI — lines per inch). Higher LPI looks smoother but requires precise printer alignment.
Also: transparency channel · alpha channel · A channel
The transparency channel of a PNG, PSD, or TIFF design file. Tells the gang sheet builder which pixels are part of the design (opaque or partially opaque) and which are background (transparent). The white channel is generated by the builder based on the alpha mask — the white layer covers everywhere the alpha is non-zero. Adaptive choke calculations also start from the alpha mask, contracting it inward by the calculated amount.
Also: packing density · designs per area
Sometimes used interchangeably, but technically different: utilization measures the percentage of sheet area covered by designs (output area / total area). Density measures the number of designs per unit area. A gang sheet with 30 small designs may have lower utilization but higher density than a sheet with 5 large designs. AI nesting optimizes utilization, which usually correlates with density too.
Also: DTF transfer pricing · gang sheet rate
Pricing models vary: per-square-inch (e.g., $0.05/sq in), per-sheet (e.g., $25 for a 22×36), per-design (e.g., $0.50/design), or percentage-of-order (e.g., 5% of retail). Per-sheet is the most common model in 2026. DTFGSA charges flat $0.15 per 22×36 inch gang sheet on production export, with the builder free to use unlimited.
See also: DTF transfer pricing calculator, DTFGSA pricing.
Also: heat press · DTF press · transfer machine
The machine that bonds a printed DTF transfer to fabric using heat and pressure. Settings typically: 150-160°C (300-320°F) for 10-15 seconds at medium pressure. The transfer film with adhesive powder bonds to the garment, the carrier film is peeled away (hot or cold depending on film type), leaving the design on the fabric. Common press types: clamshell, swing-away, conveyor (for high-volume production).
Also: Direct-to-Film vs Direct-to-Garment
DTF (Direct-to-Film) prints onto a transfer film first, then heat-presses onto fabric. DTG (Direct-to-Garment) prints directly onto the fabric. DTF works on virtually any fabric (cotton, polyester, blends, dark colors) without pretreatment, has better wash durability, and is more cost-effective for batch production. DTG produces softer hand feel on cotton specifically but requires fabric pretreatment for dark garments and is slower per-unit.
See also: DTF vs screen printing.
Also: storefront embed · DTF widget · gang sheet builder embed
A single JavaScript snippet that adds an AI gang sheet builder to any website regardless of platform — Shopify, WooCommerce, BigCommerce, Wix, Squarespace, or custom HTML. The embed renders the full builder inline on a product page and submits production-ready files into the storefront's order flow. DTFGSA's universal embed installs in under 15 minutes.
See also: Gang sheet builder for DTF print shops.
Drop a typical mixed customer order into the DTFGSA builder and watch every concept on this page in action — AI nesting, white channel generation, adaptive choke per design, RIP-ready export. Free to test.
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