What 300gsm means on a sherpa throw, and where buyers get misled
On a sherpa throw, 300gsm should mean the finished fabric basis weight of the blanket body, not the greige cloth or the printed face alone. Buyers should require the supplier to state whether the 300gsm includes face fabric, sherpa pile, and finishing losses. A workable commercial construction is usually a printed polyester face around 120-160gsm plus a sherpa reverse around 140-180gsm, with final thickness commonly about 4-7 mm after brushing, shearing, and finishing. If the mill quotes a face-only weight, the programme is under-specified.
Ask for the weight split in writing: face gsm, reverse gsm, and finished gsm measured after all wet or thermal finishing. Also ask for reverse pile height. On sherpa, pile geometry drives print definition, crush recovery, and handfeel more than headline gsm. For retail programmes, a sensible supplier-validated target is reverse pile height around 3-5 mm after shearing, with piece-size tolerance around ±2 cm on a 130 x 150 cm throw and finished weight tolerance around ±5% per piece. If the buyer wants tighter control, define which metric governs: piece weight, carton net weight, or lot average.
There are two common sherpa structures, and the difference matters. One is a knitted or woven printed face laminated or mated to a sherpa reverse; the other is a double-sided fleece construction where the face is printed before the reverse is raised and sheared. The article must be clear: this guide assumes a finished throw with a polyester sherpa reverse and a separately printed face fabric, not a fully printed pile substrate. That distinction affects colour sharpness, wash durability, and how much pressure the pile can tolerate in packing.
The first sourcing trap is assuming every 300gsm sherpa construction prints and recovers the same way. A shorter, denser pile gives cleaner graphics and less distortion, but reads flatter. A deeper pile feels softer and warmer, but hides detail, increases fold memory, and is more prone to pressure-polish marks after shipping. That trade-off is structural, not cosmetic.
If you are comparing alternatives, a solution-dyed fleece option such as solution-dyed sherpa alternatives typically gives better light stability and lower shade drift, while a flat fleece build such as fold-over hemmed fleece throws usually packs flatter and tolerates more abuse in distribution. Sherpa wins on visual warmth and tactile value; flat fleece often wins on logistics and defect visibility.
UV printing on sherpa: choose the process before you approve artwork
UV decoration on sherpa is a surface-engineering problem, not just a graphic file problem. The pile creates a variable print plane, so ink lands on fibre tips and bridges across the nap. If surface energy is uneven or cure is incomplete, the print can look acceptable off the press and still fail peel, rub, or fold tests later. Buyers should specify the print route explicitly and tie it to the approved sample.
Do not use the term UV printing loosely. State whether the supplier is doing direct-to-fabric UV-curable inkjet, UV DTF transfer, or a hybrid workflow with primer plus UV ink. The three routes are not interchangeable. Direct-to-fabric UV usually gives the softest hand and the least added film, but it depends heavily on pre-treatment, pile height, and cure control. UV DTF adds a carrier film and adhesive layer, which can improve coverage on high-pile goods but often increases stiffness, edge lift risk, and the chance of visible film boundaries if the artwork has large solids.
Use decision criteria, not slogans. Direct-to-fabric UV is usually the better choice when the artwork has moderate coverage, the buyer wants lower stiffness, and the programme can tolerate some texture break-up from the sherpa nap. UV DTF is usually the safer choice for small logos, dense white text, or short-run promotional orders where print consistency matters more than handfeel. Primer-assisted UV sits between the two: it can improve wetting and edge definition, but over-primering can create a hard patch and reduce drape. If the supplier cannot tell you which route they used on the strike-off, the sample is not production-representative.
For polyester sherpa, specify the pre-treatment method and timing: corona, plasma, primer, or a defined combination. Ask for the target surface-energy band after treatment and the allowed interval between treatment and print. A supplier may quote 38-44 dyn/cm as an operating target for polyester surfaces, but that must be treated as a supplier-validated range, not a universal requirement. The correct value depends on the machine, ink system, and finish chemistry. If the factory cannot measure surface energy with dyne pens or equivalent line controls, it is not controlling the process.
Also specify finish chemistry: anti-pilling treatment, softener type, silicone presence, and whether the reverse pile is brushed before or after printing. These variables change adhesion and hand. Heavy silicone finishes can improve softness but reduce ink anchorage. Aggressive brushing can raise fibre tips and lower apparent print sharpness. If the buyer wants a softer reverse, say so; if the buyer wants more graphic sharpness, the pile height and finish must be adjusted accordingly.
Cure matters as much as adhesion. Under-cure leaves tackiness, blocking in cartons, and transfer onto fold faces. Over-cure can embrittle the print layer and create edge cracking under flex or compression. Require the supplier to record lamp power or exposure setting, line speed, substrate temperature if monitored, and a defined rest period before folding. For soft sherpa goods, folding too soon after cure is a common cause of blocking and pressure marks.
Approve print colour on the actual bulk construction. If the artwork depends on solids or gradients, approve a strike-off on bulk fabric with the same pile height, same pre-treatment, and same finishing as mass production. Colour difference should be measured against the approved master with a practical retail target of ΔE00 ≤ 2.0 for primary brand colours and ΔE00 ≤ 3.0 for secondary shades, measured under D65 and a warm-light source such as A or equivalent. State in the PO whether the tolerance applies to strike-offs only, first bulk lot, or every carton in the shipment.
What the print must pass: adhesion, rub fastness, wash durability, and compression recovery
Replace vague acceptance language with measurable tests. For print adhesion, use a textile-ready in-house protocol on the actual printed sherpa surface. A practical method is a cross-hatch or grid cut on the print area, followed by a standard pressure-sensitive tape pull after a fixed dwell time. Define the tape type, cut spacing, blade depth, pull angle, and rating scale. If you want a benchmark, ISO 2409 can be used only as an analog for film adhesion; it is not a textile substitute. For production release, specify the pass condition as no flaking, no edge lifting, and no visible delamination in the cut zone.
For surface durability, specify ISO 105-X12 on the printed construction for dry and wet rubbing fastness. A realistic buyer target for a decorative throw is at least grade 4 dry rub and grade 3-4 wet rub, recognising that sherpa nap typically lowers wet-rub performance compared with flat knitted prints. Run both warp and weft directions if the print is directional. If the artwork has a dark ground or large solid areas, add a fold-edge rub check because pressure points at the fold often fail before the centre panel.
For laundering, specify ISO 6330 using the care route that will appear on the label. State the wash temperature, mechanical severity, detergent type where applicable, and drying method. For a washable decorative throw, a common acceptance target is dimensional change within ±3% in length and width after the selected wash cycle, with no print cracking visible at normal viewing distance and no colour transfer beyond the agreed limit onto adjacent white cloth. If the product is decorative-only, say so clearly; do not imply a heavier-duty wash claim than the construction supports.
Pile crush needs a buyer-side screen because no single consumer standard captures sherpa well. Use a defined compression load, dwell time, and recovery interval, then inspect the print and pile visually against approved photos. A practical internal method is 5-10 kPa applied for 60 seconds, followed by 24 hours recovery at standard room conditions, then inspection for bald lines, glossing, and loss of pile definition. Treat this as an in-house production control, not a universal standard. If you need more severe screening for retail shipping, add carton-compression simulation before recovery.
Ask for seam stability if the throw has bound edges or sewn labels. Decorative throws are often sewn around 6-8 SPI depending on edge style, but the seam must not open under normal shaking, folding, or fixture handling. Add a post-cure bend/flex check and a packed-carton storage check. A print that passes flat but cracks when folded is still a reject. If the product includes a hang tag or loop, run the same flex check with the accessory attached so the trim does not create a local stress point.
Clear PU hang tags: attach them without damaging pile or print
Clear PU hang tags work because they stay visually quiet and let the print carry the shelf story. They also introduce failure modes: needle-hole damage, edge snagging, clouding from static, and print contact marks if the tag rubs the face in transit. Specify the tag as a retail component with its own spec, not as an afterthought.
If you use a clear PU tag, define the thickness, cut method, and attachment method. A common commercial range is around 0.2-0.4 mm thickness, die-cut or heat-cut to reduce burrs and snagging. Where possible, specify rounded corners with a minimum corner radius rather than sharp angles. Reject tags with rough edges, whitening, or visible die slivers. The tag should not sit over the highest-loft zone of the sherpa. Keep it in the corner margin, seam allowance, or another designated hang zone, typically at least 15-20 mm away from visible print boundaries unless the artwork intentionally frames the tag.
Attachment needs numeric control. Preferred methods are fine polyester thread stitching through seam allowance, a narrow fold-in loop, or a retail loop tag that does not perforate the decorative face. If stitching is used, specify the stitch type, stitch length, and reinforcement. A practical range is 2-3 bartacks or reinforced lockstitch passes only where needed, with the stitch line kept outside the visible print field. Pull-test the attachment to a minimum of about 10 N for light retail presentation; if the item will hang in self-serve fixtures or endure repeated consumer handling, raise the threshold and state the exact number in the PO. The required result is no tearing, no elongation, and no visible distortion of pile after the pull test.
Do not place adhesives directly on the sherpa face unless the adhesion system has been validated on the actual substrate. Hot-melt dots and pressure-sensitive labels can pull fibres, leave residue, or leave a glossy scar. Ultrasonic bonding is generally poor for plush sherpa faces because it compresses the pile and leaves visible hard points; if used, confine it to hidden seam allowances and verify that the bond does not telegraph through the face after packing. Needle placement should avoid dense graphic zones because a perforation through the print area can initiate tearing or create a visible mark.
State whether the tag is attached before or after printing and final finishing. For UV-printed sherpa, the safer sequence is usually print, cure, rest, inspect, then attach the tag. Attaching before final cure or before fold-rest can trap heat, promote blocking, and leave indentation marks. If the tag carries barcodes or retail pricing, specify barcode grade, scan direction, and whether the code must remain readable through the clear PU. If the tag is decorative only, say so; otherwise the factory may print SKU data in a location that conflicts with the artwork.
Set a simple acceptance check: no visible puckering on the face, no tag-induced pile crush beyond the agreed tolerance, no sharp PU edges, and no transfer of ink or adhesive onto the pile after simulated carton vibration. Review a packed sample before bulk production is released.
What to put on the PO: a line-by-line checklist for FOB Ningbo
A usable PO removes interpretation. Use a construction line that identifies substrate, decoration, finishing, packaging, and inspection. Example: 100% polyester sherpa throw, finished 300gsm, direct-to-fabric UV print on face, brushed and sheared sherpa reverse, reverse pile height 3-5 mm, clear PU hang tag 0.2-0.4 mm attached in top corner outside the print field, fold-packed with insert card, bulk carton packed. Then add the measurable tolerances and the exact test references.
Include colour control language. Require approval against a signed-off strike-off or bulk master, then state the permitted shade band. A practical control is ΔE00 ≤ 2.0 for primary brand colours and ≤ 3.0 for secondary shades, measured under D65 and a warm light source. Say whether that limit applies to lab strike-offs, first bulk run, or all cartons in the production lot. If the print uses gradients, separate the acceptable background variation from the logo or key motif area.
Define defects clearly. Under an AQL 2.5 major / 4.0 minor plan, major defects can include broken print film, visible adhesive stain, open seam, mislocated tag, print shift outside the artwork tolerance, or a crush mark that does not recover after the agreed compression test. Minor defects can include slight yarn speck, small fold mark, or tag angle drift within an agreed limit. If your brand is premium, set tighter internal limits than the inspection AQL and write them separately.
Define carton and pack assumptions so FOB Ningbo pricing is comparable between suppliers. State the folded size, whether the throw is belly-banded, polybagged, or inserted into a printed sleeve, and the carton quantity per size or colour. A typical FOB scope should include finished goods, factory packing, inner labels, shipping marks, and export cartons to port handover. It should exclude destination duties, import taxes, inland delivery after the nominated port, and buyer-appointed third-party inspection fees unless you explicitly ask for them to be included. If the supplier quotes FOB Ningbo, request confirmation of the handover point, export declaration responsibility, and whether the price includes local terminal handling up to the named port.
Ask for carton data in advance: master carton dimensions, gross weight, net weight, and palletisation if used. For a 130 x 150 cm throw with fold-pack presentation, a common export carton might be in the rough range of 50 x 40 x 60 cm depending on fold count and pack insert, but the buyer should not rely on a generic estimate. Chargeable extras should be named up front: special hang tags, stitched labels, extra insert cards, individual retail polybags, carton testing, or labelling changes after lab approval.
Inspection terms should be explicit. If you use a pre-shipment inspection, specify the sample plan, defect list, carton opening rate, and whether random packed-unit checks include one outer and one inner carton per lot. If the route is AQL-based, define lot size bands and whether any critical defect triggers 100% screening. Keep the supplier from claiming compliance on a different lot basis than the buyer expects.
Commercial trade-offs buyers should price before they issue the RFQ
Sherpa throws are not a low-variation product. If the artwork is high-coverage, dark, or registration-sensitive, expect more waste than a flat fleece programme. The main cost drivers are print route, pile-height control, finishing consistency, and pack presentation. A direct-to-fabric UV route may reduce material cost versus a transferred film build, but it increases the need for pre-treatment, cure validation, and line discipline. UV DTF may improve hit-rate on complicated artwork, but it can add stiffness and cost per piece.
Write the MOQ around the print route. Small-batch UV DTF programmes are often viable at lower MOQ than fully engineered direct-to-fabric runs because artwork setup is faster and reject risk is lower. For direct-to-fabric UV on sherpa, the supplier usually needs a more stable minimum run to control colour, cure, and pile crush across the lot. If you need multiple colourways, ask whether each colourway shares the same base body and only the print changes; shared-body programmes usually reduce lead time and shade risk.
If the buyer wants a premium shelf hand, reserve budget for better pile selection, tighter brushing control, and less aggressive folding. If the buyer wants freight efficiency, reduce thickness and accept a less lofty reverse. These are not cosmetic options; they alter carton count, recovered appearance, and customer complaint risk.
Frequently asked
Is UV printing on sherpa better than screen printing? Neither is universally better. UV can give sharper small graphics and faster setup for short runs, but sherpa pile makes adhesion and fold durability more sensitive to surface preparation. Screen printing can be more forgiving on large, simple artwork, but thick deposits may stiffen the fabric. Choose based on artwork coverage, MOQ, and the required handfeel.
What print method should I specify for a 300gsm sherpa throw? Specify the exact route: direct-to-fabric UV, UV DTF, or primer-assisted UV. For a soft hand, direct-to-fabric UV is usually preferred if the pile and pre-treatment are controlled. For short runs or small logos, UV DTF may be more reliable, but it usually feels stiffer.
What adhesion test should I ask for on the printed area? Ask for a textile-ready in-house cross-hatch plus tape pull on the actual printed sherpa, with defined tape type, cut geometry, dwell time, and a no-flake pass/fail criterion. ISO 2409 can be a reference analog, but it is not a textile-specific substitute.
How should pile crush be tested? Use a defined compression load, dwell time, and recovery interval on the finished throw. A practical internal screen is 5-10 kPa for 60 seconds, then 24 hours recovery, with no permanent bald lines, no glossing, and no sharp crease whitening in the printed field.
What does FOB Ningbo usually include? FOB Ningbo usually covers finished goods, export packing, shipping marks, and handover at the named port under the agreed Incoterms rule. It typically excludes destination duties, import taxes, and inland transport after the port unless otherwise stated. Confirm whether local terminal handling and export declaration are included in the quote.
What tolerances are realistic for colour and size? For colour, a practical buyer target is ΔE00 ≤ 2.0 for primary colours and ≤ 3.0 for secondary shades, measured against the approved master under defined light sources. For size, ±2 cm on a 130 x 150 cm throw is a common commercial target, but you should tie the acceptance limit to the packaging method and sewing construction.
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