Close-up of raised puff screen print ink on a navy 280gsm polyester flannel throw during QC measurement

Base cloth line: 280gsm flannel is soft, but it moves under ink

For sports merchandise, 280gsm polyester flannel throws with puff screen print usually start with warp-knitted polyester flannel or flannel fleece, brushed and sheared for a short, smooth pile. Common retail sizes are 130 × 160 cm, 150 × 200 cm, 60 × 80 in, or club-specific sizes packed under a belly band. State that finished GSM is measured on brushed, heat-set, ready-to-cut fabric, not greige or pre-brushed fabric. Use ISO 3801 or ASTM D3776, with a normal bulk tolerance of ±5% unless the buyer manual is stricter.

Polyester flannel at this weight gives a useful handfeel-to-cost balance for stadium giveaways, club shops, sponsor merchandise and e-commerce packs. It is lighter than sherpa-backed throws, packs better for carton and parcel shipping, and accepts screen print better than many long-pile plushes. The trade-off is pile mobility. The ink sits partly on fibre tips rather than a flat woven surface. If the pile is too long, uneven, oily from softener or poorly sheared, puff ink bridges across fibres, cures irregularly and cracks when folded across the logo.

Ask for pile height and face finish, not only GSM. For a 280gsm flannel throw intended for puff print, a defensible mill starting target is 1.5–2.5 mm visible pile after shearing, light anti-pilling finish and no silicone-heavy softener in the print zone unless confirmed compatible by strike-off. This range is from production practice on short-pile polyester flannel, not a universal standard. Higher loft can feel richer but gives worse logo edges. If the artwork includes sponsor legal text, fine stars, ball textures or strokes below about 3 mm, choose a smoother flannel or another decoration method.

Suggested fabric performance lines for a 280gsm polyester flannel sports throw are: dimensional change after washing within ±3% after 3 cycles under ISO 6330 or AATCC 135; skew or twist after washing not visually distorting rectangular edges; pilling grade minimum 3–4 after ISO 12945-2 or ASTM D3512 as buyer-agreed method; colourfastness to washing ISO 105-C06 grade 4 or better for colour change and staining where practical; rubbing fastness ISO 105-X12 or AATCC 8 dry grade 4, wet grade 3–4 for dark shades; light fastness ISO 105-B02 grade 4 minimum for normal indoor retail use, higher if sold for outdoor seating or beach use.

Polyester-specific heat risks must be built into the fabric approval. Disperse dyes in red, burgundy, navy and black fleece can migrate into pale puff ink during curing or during warehouse storage. Heat yellowing and scorch are also possible if the face pile is over-exposed in the dryer. Before bulk, test the exact shade lot with the proposed ink system and cure recipe. For dark or disperse-rich grounds, specify a low-bleed underbase or barrier chemistry if recommended by the ink supplier, then verify no sublimation bleed after curing, after 24–72 h rest and after washing.

Edge construction matters because the print is rarely the only failure point. A budget throw may use overlock only; retail sports throws often use self-fabric binding, whip stitch or folded hem. If seam strength is required, specify a method and minimum. For fleece throw edges, ASTM D5034 can be used as an agreed grab-strength method, but the buyer should define whether the result is fabric break, seam slippage, stitch rupture or binding tear. A practical internal target for bound fleece throws is no seam opening greater than 3 mm after washing and no binding detachment under normal manual extension; heavier-duty stadium programmes may require buyer-specific seam pull testing. For stadium-grade overlocked edges, compare construction choices in polar fleece stadium blankets with whipped-stitch edges. For all-over photographic club graphics rather than raised crests, see digital sublimation printing on 280gsm flannel fleece.

Artwork and screen: raised ink needs blunt geometry

Puff screen print expands because a blowing agent or expandable component in the ink activates during heat curing. The printed deposit rises and rounds. That is the effect buyers want for a crest, wordmark or mascot outline, but it also closes counters and softens corners. A vector file that looks sharp on paper may become swollen on brushed fleece. For production, specify vector artwork, Pantone references for non-puff colours and a separate artwork layer naming exactly which areas are puff.

For sports throws, safe puff artwork uses strokes of 4–6 mm or wider, open gaps of at least 2–3 mm and lettering preferably above 18–22 mm cap height. These are starting limits from production practice, not guarantees. Ink supplier TDS, mesh count, stencil thickness, artwork area and fabric pile all change the result. Thin registered trademark symbols, small sponsor terms, QR codes, halftones and detailed ball textures should be printed flat, embroidered on a patch, woven into a label or removed. If the club insists on a complex crest, approve a strike-off on the actual navy, black, red, burgundy or heather flannel ground. A strike-off on cotton jersey does not predict behaviour on polyester pile.

Screen mesh and stencil thickness control deposit. On fleece throws, coarser mesh than T-shirt printing is common, often around 24–43T metric mesh, depending on ink system, design area and required height. Too fine a mesh gives low deposit and weak puff. Too open a mesh floods the pile, increases cure time and creates a rubbery patch. A thicker stencil can help height but increases pinholes, edge sawtooth and uneven curing on large blocks. Record mesh count, thread diameter where known, stencil type, emulsion over mesh where measured, squeegee hardness, squeegee angle and print strokes on the approved strike-off record.

Registration tolerance should be stated before artwork approval. On stretchy knitted flannel, ±1.5–2.5 mm registration for multi-colour print is more realistic than paper-print expectations. If a puff outline surrounds a flat fill, build overlap or trap into the file. Do not use hairline traps. Print placement tolerance also needs a number: for a centre logo on a throw, ±10 mm from agreed centreline is commonly workable; for border or corner artwork, ±5–8 mm may be required if packing exposes the logo. Buyers needing sharp small detail are usually better served by flat screen print, sublimation, appliqué or a patch; see custom blanket decoration methods for practical differences.

A common failure scenario: a club approved a 90 mm puff crest on a sample throw, then scaled the same crest to 260 mm for retail blankets without adjusting stroke width or cure. The bulk logo looked attractive on the top face but cracked through the mascot outline after the first fold because the thickest ink sat exactly on the retail fold line. The correction was not only “more curing”. We moved the fold, reduced the largest solid puff areas, kept fine text flat, used a low-bleed underbase on the navy ground and revalidated wash/flex before bulk packing. Large blanket graphics behave differently from small apparel chest prints.

Ink chemistry: plastisol puff, water-based puff and silicone/PU systems are not interchangeable

Do not approve a sample labelled only as “puff print”. The ink family changes cure, handfeel, compliance risk and wash performance. The mill should identify the ink system in the technical file and keep the ink supplier technical data sheet on record. The approved recipe must be based on that TDS and then verified on the actual blanket fabric.

Plastisol puff can give strong height and good opacity on dark fleece. It is forgiving in screen printing but has compliance points: phthalate content, restricted plasticisers, heavy metals in pigments and PVC-related brand restrictions. Some sports licensors and retailers will not allow PVC plastisol even if it passes basic testing. Plastisol can feel heavier and warmer on a large blanket logo, and over-thick deposit can crack at fold lines if under-fused.

Water-based puff gives a drier, softer hand and may be preferred by buyers avoiding PVC. On polyester flannel, it is more sensitive to fabric absorbency, pile density, drying balance and cure completeness. If flashed too hard, it can crust on top and trap moisture underneath. If under-cured, it may powder, collapse or show poor washing. It can also interact with disperse-dyed polyester shades, so dark grounds need rubbing and staining checks.

Silicone or PU-based raised systems can offer elastic hand and good crack resistance when properly specified, but they are usually higher cost, more process-sensitive and may require primers, catalysts, longer cure or controlled pot life. Silicone can feel premium but may be difficult to overprint and can attract dust if surface cure is wrong. PU systems need attention to blocked isocyanate chemistry, solvent or VOC restrictions where applicable, and brand RSL limits.

Ink substitution is a common root cause of bulk mismatch. A supplier may replace the sample ink because the original is expensive, out of stock or too slow on the production dryer. Your PO should state: no change of ink brand, ink family, puff additive ratio, catalyst, mesh, stencil, dryer recipe or curing method without new strike-off approval.

Practical comparison for buying decisions: plastisol puff is usually best for strong raised opacity on dark grounds where PVC is allowed; water-based puff is better where a softer dry hand and PVC avoidance matter, but needs stricter drying control; silicone or PU raised ink is chosen for premium elasticity or high-flex logos, usually with higher MOQ, higher ink cost and slower line speed. If the artwork is photographic or colour-gradient, choose sublimation instead. If the logo is small and premium, embroidery or an appliqué patch may outperform puff. If the logo includes fine sponsor text, a woven label or flat print is safer.

Puff height: specify the measuring method, not a marketing adjective

“High puff” is not a specification. On 280gsm polyester flannel, a realistic raised effect after curing is often around 0.4–1.2 mm above the surrounding pile, depending on ink deposit, fabric pile, artwork and heat exposure. Buyers sometimes request 2 mm or more after seeing foam-like samples on flat fabric. On brushed polyester throws, that height can become brittle, heavy, slow to cure and prone to edge cracking, especially when a chest logo is scaled up to blanket size.

Use a measurable target such as: puff raised height 0.6–1.0 mm above adjacent pile after curing and 24 h conditioning. A workable tolerance is target ±0.2 mm for defined solid areas, with no individual approved reading below 0.4 mm unless the artwork zone is narrow. For large-area logos, set a maximum as well as a minimum; above about 1.2 mm on a soft throw, folding stiffness and cracking risk rise quickly.

Suggested internal measuring method: condition the finished throw or cut panel at 20 ±2°C and 65 ±5% RH for at least 4 h, preferably 24 h for approval samples. Lay the item flat on a hard, smooth table with no seam, fold, label or packing crease under the logo. Use a low-pressure digital thickness gauge or fabric thickness tester with a 10 mm circular foot for narrow strokes or 20 mm circular foot for broad solid areas. Use measuring pressure around 0.5–1.0 kPa, or record the exact pressure if the instrument uses a fixed spring load. The same foot and pressure must be used for sample approval and bulk inspection.

Take at least five paired readings on the same approved logo zones: centre of a solid puff block, two edge areas, one narrow stroke and one curved area. For each zone, first measure the printed area, then measure adjacent unprinted pile within 10–20 mm of that point, avoiding crushed pile, seams and colour-transition edges. Calculate raised height as printed thickness minus adjacent pile thickness. Do not compare print thickness to fabric base thickness unless that method is separately defined, because pile compresses differently from cured ink.

Pass/fail should be written plainly: average raised height within approved target range; no more than one of five readings outside tolerance by more than 0.1 mm; no visibly flat patches larger than 5 mm in a solid puff area; no collapse at fold lines after conditioning. Keep macro photos at fixed distance and angle beside the golden sample because height numbers alone do not catch edge quality.

Visual acceptance should cover the faults buyers actually reject. Suggested standard: no pinholes above 1 mm in diameter in the main logo area; no more than three pinholes of 0.5–1.0 mm per 100 cm² of solid print; no edge spread more than 1.5 mm beyond approved artwork on straight strokes; no sawtooth or ragged edge visible at normal inspection distance of about 60 cm unless present on the approved sample; no oily halo, wet ring or plasticiser mark around the ink; no brown scorch, yellowing or gloss burn on the surrounding pile; no collapsed crater, blister, fish-eye, dust inclusion or open mesh mark that changes the logo read. These numbers should be tightened for premium retail or relaxed by written approval for low-cost event goods.

Cure validation: record ink-film temperature, not only dryer setting

Puff cure is a heat/time process. The dryer display may show 160°C, but the ink film may reach less than that if the belt is fast, the blanket is damp, the print is thick or the panel rides over seams. Conversely, polyester flannel pile can scorch or shrink if the dryer air temperature is high even when the ink film is under-cured. Bulk control must follow the ink supplier TDS and be verified on the actual printed throw.

For a tunnel dryer, record dryer type, number of chambers, set temperature by zone, belt speed, exhaust setting if adjustable, flash unit conditions if used, room conditions where relevant and actual dwell time from entry to exit. For a batch or cabinet dryer, record rack position, load quantity, set temperature, warm-up time and exposure time. A typical puff system may require ink-film temperatures in the broad range of about 140–170°C for 60–120 seconds, but this is only a guide; the supplier TDS controls the recipe.

Measure ink-film temperature, not only ambient dryer temperature. Use thermostrips placed directly on or beside the printed ink area for routine checks, or a calibrated fine-wire thermocouple/probe taped so the sensing point contacts the ink surface without insulating it. For validation trials, run the temperature recorder through the dryer on the printed panel and place sensors at the thickest puff area, a narrow stroke and an unprinted flannel area near the logo. Infrared guns are useful for quick checks but can misread glossy or textured ink; do not use IR alone for approval unless emissivity and method are controlled.

Acceptance should be written against the TDS: ink film reaches the minimum cure temperature for the minimum dwell time stated by the ink supplier; puff expansion meets approved height; no hand tack after 24 h; no dye migration or halo after 24–72 h rest; no pile scorch or yellowing compared with the approved shade; no fabric shrinkage outside the approved dimensional tolerance. If the TDS gives a range, validate the lowest working recipe that still passes wash and crack testing, rather than over-baking the blanket for safety.

During bulk production, check cure at start-up, after any dryer stoppage, after lunch or shift change, after screen cleaning, after ink addition and at least every 500–1,000 pieces for long runs. Retain printed, cured swatches or panels from start/middle/end of each shade lot. If a tunnel stoppage leaves blankets under heat, segregate that quantity; do not mix it back into first-quality stock without inspection for scorch, hand change and over-puff brittleness.

Wash, flex and crack testing: test the fold line, not only a flat logo

Puff print can pass a simple rub test and still fail after consumer washing because the failure occurs through the thick ink ridge at a fold. For blankets, the test should include washing, drying and flexing across the actual packing fold if the logo is folded in the carton or retail band. If possible, design the pack so the main puff logo is not on the tightest fold.

A practical wash protocol is ISO 6330 domestic washing or AATCC 135, using the care label conditions intended for sale. For polyester flannel throws, many programmes use 30°C or 40°C gentle machine wash, mild detergent, no chlorine bleach and tumble dry low or line dry, depending on the market care claim. State the exact cycle, detergent, load ballast, drying method and number of cycles. For approval, test at least 3 cycles; for retail or licensed programmes, 5 cycles gives a more useful view. Industrial laundry testing is a separate requirement and should not be assumed for home throws.

Post-wash evaluation should include: print appearance, raised height retention, colour change, dye bleed into pale ink, edge lifting, cracking, tack, powdering, halo, fabric shrinkage and pile matting. Use greyscale ratings where relevant: ISO 105-A02 for colour change and ISO 105-A03 for staining, or AATCC equivalents if that is the buyer system. For many sports merchandise blankets, a reasonable post-wash print appearance target is grade 4 or better against the approved control, with no obvious logo distortion at normal viewing distance.

For crack acceptance, define measurable limits. Suggested standard after 3–5 domestic wash/dry cycles and manual flexing: no continuous crack longer than 5 mm; no crack width greater than 0.5 mm exposing the ground fabric in main logo areas; cumulative cracking not exceeding 20 mm per 100 cm² of puff print; no flaking or adhesion loss larger than 2 mm in diameter; no edge lift that can be raised with a fingernail over more than 3 mm length. For premium retail, tighten these limits. For distressed artwork, document intentional cracks in the artwork file and approved sample.

Add a simple flex procedure if no buyer method exists. After washing and conditioning, fold the logo ink-to-ink or ink-to-fabric along the same line used in packing, press by hand with consistent pressure, then open and close 20 times. For a more severe internal check, wrap the printed area around a 25 mm mandrel for 10 cycles, then inspect under good light. Do not use this as a claimed international standard unless a recognised buyer method is specified; it is a practical factory stress test to find under-cure and over-thick deposits before shipping.

Cross-hatch adhesion tests can damage pile and may not correlate well with raised ink on fleece, but a modified tape-pull on a retained swatch can still reveal poor fusion or contaminated fabric. If used, define tape type, dwell time and pass criteria. Any adhesive tape test should be agreed before bulk because aggressive tape can pull loose fibres from perfectly acceptable brushed flannel.

Compliance and RSL: puff ink adds chemical exposure beyond the blanket fabric

Compliance cannot be copied from a plain fleece throw. The printed ink, puff additive, pigment, underbase, catalyst, softener and packaging may each introduce restricted substances. Ask for current SDS and compliance declarations from the ink supplier, but treat them as supporting documents, not a substitute for finished-product testing where the buyer or regulation requires it.

Likely RSL items for puff-printed polyester throws include phthalates and restricted plasticisers, organotins, formaldehyde, banned azo dyes, extractable heavy metals, total lead and cadmium where applicable, PAHs, phenols such as APEO/NPEO, chlorinated solvents, VOCs/solvents from some systems, DMF where relevant, and disperse dyes with sensitisation concerns depending on buyer list. Dark printed grounds should also be reviewed for dye migration and staining, because a chemically compliant product can still be commercially rejected if a white logo turns pink or grey.

Regulatory route depends on market and age grading. US children’s products may trigger CPSIA requirements such as lead limits, phthalates and tracking labels if the product is designed or marketed for children. California sales may require a Prop 65 review. EU/UK sales normally require REACH SVHC review and buyer RSL alignment. Brand-licensed sports merchandise often has its own manual covering PVC restrictions, heavy metals, nickel in trims, packaging warnings, barcode rules and labelling. Do not claim OEKO-TEX, GRS, recycled content or other certification unless the exact facility, material scope and transaction documents support it; for broader buyer controls see textile certifications explained for buyers.

Flammability should also be checked according to the sale market and product positioning. In the US, general wearing apparel rules are not the same as bedding or blanket requirements, and a throw sold for home use may be reviewed differently from a costume or children’s item. Polyester fleece normally melts away from flame, but raised ink, softeners and packaging residues can change behaviour. If a buyer asks for CFR 16 Part 1610, BS 5852, ISO 12952 or another method, specify the exact method and acceptance class; do not use a generic “FR pass” line.

Inspection plan: approve the strike-off, then police the production variables

A good puff programme needs a sealed golden sample and a production file. The file should include fabric shade lot, GSM result, pile target, artwork version, colour references, ink brand/system, batch or lot numbers where available, mesh, stencil, squeegee, print strokes, dryer settings, measured ink-film temperature, puff-height readings, wash results and packing fold. Keep one sealed strike-off at the mill, one with the buyer and one available for the third-party inspector if used.

For final inspection, many buyers use ANSI/ASQ Z1.4 or ISO 2859-1, General Inspection Level II with AQL 2.5 for major defects and AQL 4.0 for minor defects. Critical defects should be zero tolerance. Some retailers require tighter levels, and low-value event programmes may accept different limits, but state the plan in the PO. Class major defects as wrong artwork, wrong placement beyond tolerance, severe cracking, uncured/tacky ink, dye bleed, scorch, wrong shade, wrong size, missing label, unsafe packaging or carton mix. Minor defects may include small lint marks, minor print specks within the approved limit or slight pile pressure marks that recover.

Sampling should include carton-level and shade-lot coverage. Do not pull all samples from the top of one carton. Inspect across start/middle/end production, each fabric dye lot, each print shift and each carton pack style. Check carton marks, SKU, barcode scan, quantity, polybag warning if used, belly band position, desiccant or anti-mould requirements if specified, carton dimensions and gross/net weight against the packing list.

Placement checks need a template. Measure from the finished blanket edges or agreed centreline after the blanket is relaxed flat, not stretched. Record at least three points for large logos: horizontal centre, vertical centre and rotation/skew. A practical tolerance for a central logo is ±10 mm from specified location and skew within 3 mm per 100 mm logo width unless the artwork or buyer requires tighter. Corner logos, border prints and fold-visible retail logos should have their own tolerances.

Destructive testing frequency should be agreed. A workable factory plan is one wash/flex test from pre-production or pilot run, then one retained printed panel or finished piece per 2,000–3,000 pieces per colour/print recipe, with additional tests after ink batch change, fabric shade-lot change or dryer recipe change. If the order is small, test at least one production piece per colour. Keep retained samples for the claims period agreed in the contract, commonly 6–12 months for seasonal sports merchandise.

For a fuller blanket inspection framework, compare blanket quality control inspection and AQL inspection for 280gsm flannel throw blankets.

PO wording buyers can copy into the specification

Use precise PO wording so sourcing, print room, QA and third-party inspection read the same requirements. A buyer specification for this product can be written as follows:

Product: 280gsm polyester flannel fleece throw, finished size [insert], size tolerance ±3% after finishing unless buyer manual states otherwise. Finished fabric GSM 280 g/m² ±5% tested to ISO 3801 or ASTM D3776. Face pile sheared short, visible pile target 1.5–2.5 mm, compatible with puff screen print; no silicone-heavy softener in print zone unless approved by strike-off. Edge finish [overlock / binding / whip stitch / hem] with colour and stitch density specified.

Artwork and placement: buyer-supplied vector file version [insert], puff areas on separate named layer. Minimum puff stroke/gap agreed from approved artwork. Print position [insert dimensions from edges or centreline], tolerance ±[insert] mm; rotation/skew tolerance [insert]. Multi-colour registration tolerance ±[insert] mm. Packing fold must not pass through main puff logo unless wash/flex test is approved across that fold.

Ink and screen: ink family [plastisol puff / water-based puff / silicone/PU raised system], ink brand/system [insert if approved], low-bleed underbase or barrier required for dark/red/navy polyester grounds where needed. Record mesh [for example 24–43T metric as validated], stencil type/thickness, squeegee hardness and print strokes. No substitution of ink brand, ink family, puff additive ratio, catalyst, pigment, mesh, stencil, curing method or dryer recipe without written buyer approval and new strike-off.

Cure and puff acceptance: cure strictly to ink supplier TDS, verified by ink-film temperature measurement using thermostrip or calibrated probe on printed fabric. Record dryer type, set temperatures by zone, belt speed, dwell time and actual ink-film temperature at start-up and during bulk. Puff raised height target [for example 0.6–1.0 mm above adjacent pile] after 24 h conditioning; measure five paired points using agreed low-pressure thickness gauge foot/pressure. Visual standard: no tack, oily halo, scorch, dye migration, collapsed areas, blisters, pinholes above approved limit or edge spread above [insert] mm.

Testing: fabric dimensional change ISO 6330 or AATCC 135 after [3 or 5] cycles within ±3% unless otherwise agreed. Colourfastness ISO 105-C06, ISO 105-X12/AATCC 8 and ISO 105-B02 as applicable. Puff print wash/flex test after [3 or 5] domestic wash/dry cycles: no continuous crack longer than [5] mm, no crack width greater than [0.5] mm exposing ground fabric, no adhesion loss larger than [2] mm, no unacceptable bleed or halo. RSL compliance to [buyer manual / REACH / CPSIA / Prop 65 / brand license] as applicable to market and age grade.

Inspection and packing: final inspection to ANSI/ASQ Z1.4 or ISO 2859-1, General Level II, AQL major 2.5, minor 4.0 unless buyer manual differs; critical defects zero tolerance. Approved strike-off retained by mill and buyer. Lot traceability by fabric shade lot, ink batch if available, print date and carton range. Packing [polybag / belly band / insert / carton count] with barcode and carton marks as buyer file. Goods failing cure, puff height, wash/crack, artwork, placement, shade, odour, RSL or packing requirements may be rejected or reworked only with written buyer approval.

Decision guide: when puff print is the wrong decoration

Choose puff print for bold crests, block letters, mascot outlines and tactile merchandising where the raised effect is part of the value. Keep the print area moderate. A 70–180 mm logo is usually easier to control than a 350 mm solid puff mark on a soft throw. The larger and thicker the ink area, the more it changes drape, fold packing, cure time and crack risk.

Choose sublimation when the artwork needs photographic gradients, all-over colour, fine sponsor marks or very soft hand. Sublimation works best on white or pale polyester face fabric and does not create raised texture. For process limits and MOQ decisions, use digital sublimation printing on 280gsm flannel fleece.

Choose embroidery or appliqué for premium small logos, club badges and retail patches where texture and durability matter more than low decoration cost. Watch needle cutting, backing stiffness and patch edge lift on fleece. For large cheap logos, embroidery can become too heavy and distort the blanket.

Choose woven labels, rubber patches, heat-transfer woven labels or flat screen print for small legal marks, sponsor names, washing symbols, QR codes or high-detail badges. Puff print should not be used as a cure-all for every logo. It is a controlled raised effect with real process limits. The cleanest bulk orders are the ones where the buyer chooses the decoration method after reviewing artwork scale, fabric pile, wash target, compliance route and packing fold together.

Frequently asked

What puff height is realistic on a 280gsm polyester flannel throw? For short-pile polyester flannel, a practical target is often 0.6–1.0 mm raised height above the adjacent pile after curing and conditioning, with about ±0.2 mm tolerance. Some designs can reach around 1.2 mm, but higher deposits usually increase stiffness, cure difficulty and crack risk.

Can we use the same puff print specification from T-shirts? Not safely. Brushed flannel has pile movement, more thickness, different heat behaviour and different folding stress. T-shirt mesh, artwork strokes and dryer settings often give poor edge control or under-cure on fleece throws. Revalidate on the actual blanket fabric and shade lot.

Which ink system is best: plastisol, water-based or silicone/PU puff? Plastisol puff gives strong height and opacity but may conflict with PVC or phthalate restrictions. Water-based puff has a softer dry hand but needs stricter drying and cure control on polyester. Silicone or PU raised systems can give good flexibility but cost more and are more process-sensitive. The buyer’s RSL, handfeel target, artwork and wash requirement should decide the system.

How should cure be checked in bulk production? Record dryer settings and belt speed, but also measure ink-film temperature using thermostrips or a calibrated probe on the printed area. Validate against the ink supplier TDS, then check at start-up, after stoppages or shift changes, after ink additions and at regular intervals during the run.

What wash test should be used for puff print on flannel blankets? Use ISO 6330 or AATCC 135 with the intended care label conditions. Test at least 3 cycles for development and preferably 5 cycles for retail approval. Inspect cracking, adhesion, dye bleed, halo, height loss and fabric dimensional change. Include flexing across the actual packing fold if the logo is folded in the retail pack.

What are unacceptable puff print defects? Major defects include tacky or uncured ink, visible cracking beyond the agreed limit, adhesion loss, dye migration into pale ink, oily halos, scorch or yellowing, wrong artwork, wrong placement, severe edge spread, collapsed puff and pinholes larger than the agreed standard. The approved strike-off should define acceptable minor texture variation.

What AQL is typical for final inspection? Many buyers use ANSI/ASQ Z1.4 or ISO 2859-1 General Inspection Level II, with AQL 2.5 for major defects and AQL 4.0 for minor defects, and zero tolerance for critical defects. Retailers or brand licensors may require tighter plans.

Should the logo be folded in packing? Avoid tight folds through thick puff print where possible. If the retail pack requires it, test wash and flex across that exact fold line before bulk. A logo can pass flat inspection but crack after repeated folding if the ink deposit is thick or under-cured.

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