How to approve garment and textile wash performance
Approve finished samples against written limits after the intended washing and drying cycle. Record measurements before and afterwards, check twisting, colour transfer and trim damage, and retain the results before authorising production or shipment. Agree the approval brief with Cambridge China Bridge.
Agree the care cycle and acceptance limits
Add a wash approval sheet to your product specification. State the intended care instructions, washing programme, temperature, detergent, load, spin, drying method and any ironing or reshaping. Agree how many cycles to run and when to assess the samples. For hospitality linen, describe the intended commercial laundry process rather than substituting a domestic wash.
Set separate acceptance limits for dimensional change, twisting, colour change, staining and trim damage before testing. Define what makes the product unusable, such as a sheet that no longer fits or a zip that jams. Record whether assessment happens before or after permitted ironing or reshaping, so these steps cannot conceal a failure.
Choose samples that represent the order
Use finished articles with the ordered fabric, dye, print, seams, lining, trims and finishing treatment. A fabric swatch cannot show how the assembled product behaves. Identify the sample, size, colour, material batch and production stage. Keep an unwashed comparison sample and photograph the test articles before washing.
Include combinations likely to behave differently: dark panels beside pale fabric, contrasting bindings, prints, elastic and mixed materials. Agree which sizes and colours need separate testing and record the reason for grouping others. Use our guide to test coverage across colours and sizes when reviewing proposed report coverage.
Measure before washing and after drying
Draw and label the measurement points. For garments, include body length, chest width, sleeve length, waist and leg length as relevant. For household textiles, include overall length and width, fitted corners and closure dimensions. Lay samples flat without stretching and record the measuring position, equipment and units. Our factory measurement guide helps align the buyer and factory method.
Measure the same marked points after the agreed drying and resting conditions. Record the original dimension, final dimension and whether it shrank or grew. Calculate shrinkage by dividing the reduction by the original dimension and expressing it as a percentage. Keep directions separate rather than averaging them. Check the final usable size as well as the change from the starting size.
Check shape, colour and trims separately
Photograph the dried article in the same position as before washing. Check side seams and legs for rotation, hems for skew, panels for puckering and household textiles for distorted corners. Agree how displacement will be measured against the original seam or edge position. Recheck garment fit or fit on the intended bed, cushion or other article.
Compare colour with the unwashed sample under consistent lighting. Inspect pale panels and agree a laboratory staining assessment using suitable adjacent fabrics where colour transfer matters. Record fading separately from staining. Operate zips, fasteners and elastic after drying, and inspect buttons, bindings, prints, labels and bonded decoration for loosening, cracking, peeling, corrosion or loss of function.
Make approval traceable to production
Request a report containing sample identities, the actual care cycle, cycle count, raw measurements, photographs and a result against each agreed limit. If using a laboratory, ask it to identify the methods and assessment conditions before testing. Query missing drying details or a report that only says pass. Keep the washed articles and comparison sample with the approval record.
Approve, reject or request correction in writing, naming the sample and specification revision. After a change to fabric, dye, finishing, construction or trims, agree which checks to repeat. Arrange wash checks on representative bulk-production articles before release. Keep this decision alongside the batch inspection plan, with unresolved wash failures clearly recorded.
Frequently asked questions
What shrinkage limit should I give the factory?
Set limits from fit and intended use, separately for relevant dimensions. Agree both the permitted change and the usable finished size after the specified care cycle.
Can I approve wash performance from a fabric swatch?
Use swatches for preliminary checks, then test finished articles. Seams, linings, contrasting colours and trims can behave differently when assembled.
Does a wash test include tumble drying?
Only if the agreed procedure includes it. State the drying method and conditions explicitly, and assess after the intended complete care cycle.
What if the sample passes but bulk goods fail?
Hold approval of the affected goods. Compare materials, finishing and test conditions with the approved sample, document the cause and retest corrected production before release.