Quality Control at ZipaSports: Checkpoints, Tests and Tolerances

Every QC checkpoint at a glance

ZipaSports runs eight quality-control checkpoints on every custom sportswear order made in Sialkot, Pakistan, and each is measured against a document the buyer approved beforehand: the mockup, the size specification or the order sheet.

Pre-shipment photos of the checked order and a video tour of the factory floor are both available on request.

Fabric inspection: GSM, shade and defects

Fabric inspection happens before any cutting, because a fault found on the roll costs a few metres and the same fault found after sewing costs a garment. Three things are checked on every lot.

GSM. A circular swatch is cut from the roll with a GSM cutter and weighed on a balance; the result must sit inside the range on the order, for example 140–180 GSM for a polyester interlock jersey or 240–300 GSM for a nylon-spandex legging. A roll that weighs light feels thin and prints paler; a roll that weighs heavy changes the fit and the drape.

Shade. Piece-dyed fabric for screen-printed or embroidered garments is compared with the approved swatch or the previous lot in daylight. Sublimation blanks are checked for a consistent white base, because an off-white base shifts every printed colour on top of it.

Defects. Rolls are checked for holes, slubs, thick and thin yarn, oil marks, barré (faint horizontal stripes from uneven yarn) and needle lines. Single defects are marked and the cutter works around them; a roll with repeated defects is rejected and replaced. The full option ranges are on the fabrics page and in the GSM chart.

Pre-production sample approval

The pre-production sample is the checkpoint that turns a design into a contract. ZipaSports produces a free digital mockup within 24 hours; once the buyer approves it, a physical sample follows in 5–7 days, charged at sample cost and credited against the bulk order.

The buyer checks the sample for fit, fabric hand, print colour, trim placement and label position, and either approves it or sends corrections. Bulk fabric is cut only after that approval. From this point the approved mockup and the approved size specification are the reference documents for every later checkpoint: the print check compares against the mockup, the measurement check compares against the size spec, and the final inspection compares against both.

For a club secretary this is the moment to try the shirt on the largest and smallest player in the squad. For a brand founder it is the moment to check the woven neck label and hang tag against the brand file. Corrections cost little at the sample stage and a great deal after cutting, which is why bulk does not start without a written approval. The wider sequence is described on the manufacturing process page.

Print check against the approved mockup

Every printed, embroidered or transferred panel is checked against the approved mockup before it reaches the sewing line, because a print fault is cheapest to fix while the panel is still flat. What is checked depends on the decoration method.

Names and numbers are checked line by line against the buyer's squad list, because a misspelt surname is the most common complaint in team kit and the one a buyer notices first. Each personalised panel is tagged with its size and checked a second time at final inspection.

In-line stitching checks

Stitching is checked on the line, not only at the end. A line supervisor pulls pieces as they leave each operation, hand-stretches the seam to check its strength, looks along the seam length for skipped stitches, and confirms that thread ends are trimmed and that trims (zips, drawcords, eyelets, labels) match the specification. What counts as a pass depends on the seam type.

A piece that fails goes back to the operator who sewed it, which corrects the cause rather than the symptom: a wrong tension setting or a blunt needle is fixed before it affects the pieces that follow. In-line checks are what keep the final inspection fail rate low enough for the order to ship on the confirmed date.

Measurement check: ±1–1.5 cm against the approved size spec

Every size in the order is measured against the approved size specification, and the tolerance is ±1–1.5 cm depending on the measurement point. The specification is agreed at the sample stage, so a buyer who wants a longer body or a wider chest changes the spec then, not at the measurement check.

The tolerance exists because knitted fabric moves: a stretch knit relaxes after cutting and again after the sublimation press, and a woven gi cloth shifts with humidity. A garment inside tolerance is within specification. A garment outside it is reworked where the construction allows, for example a hem taken up, and otherwise remade. Adult sizes run XS–5XL, women's XS–4XL, with youth sizes and fully custom size charts available; the size chart guide explains how to build a spec that fits a real squad.

Wash and colour-fastness check on sublimated fabric

Sublimated fabric is checked for colour-fastness before it is sewn. A printed swatch from the lot is washed and then compared with an unwashed swatch from the same lot for shade change, checked for colour transfer onto a white test cloth, and checked for bleeding at the edge of dark panels into adjacent white areas.

Sublimation dye bonds into the polyester fibre at around 200 °C rather than sitting on the surface, so a correctly pressed panel does not crack, peel or fade under normal washing. The check catches the exceptions: an under-pressed panel where the dye has not fully transferred and rubs off, or a fabric lot with the wrong finish where the dye takes unevenly. A lot that fails is rejected and reprinted rather than sewn.

Screen-printed panels are checked for cure by stretching the print and looking for cracking; DTF and heat transfers are checked for edge adhesion after the press. Fabrics used on these orders are OEKO-TEX® Standard 100 tested, and certificate copies are available on request. A comparison of how each method behaves in the wash is in the sublimation vs DTF vs embroidery guide.

Final inspection and packing check

Final inspection is the last look at each garment before it is folded, and the packing check is the count that follows. Both are made against the order sheet and the approved mockup.

Private-label buyers can supply their own hang tags, polybags and boxes, or have ZipaSports produce them; see labels, tags and packaging. Export documents (commercial invoice, packing list, certificate of origin) are prepared from the same count. Pre-shipment photos of the packed order are sent on request before the courier collects.

What happens when a piece fails

A piece that fails any checkpoint is reworked or remade before the order ships; it is not shipped and discounted, and it is not shipped short. Because printing, sewing, finishing and packing all happen in-house at ZipaSports in Sialkot, Pakistan, a failed piece goes straight back to the operation that produced it: a misprinted panel to the print room, an open seam to the sewing line.

Rework is used where it restores the piece to specification, for example re-trimming thread ends, re-sewing a skipped section or re-pressing a transfer. Remake is used where rework would leave a visible trace, for example a ghosted sublimation panel or a wrong size. If remakes push against the confirmed dispatch date, the buyer is told and the date is reconfirmed rather than the order going out incomplete.

The checkpoints run within an ISO 9001:2015 quality management framework; certificate copies are available on request from the certifications page. If a defect does reach a buyer, the Quality Guarantee applies: if any garment arrives with a manufacturing defect, we remake it free of charge — the remake goes into production within 3 days of your report.