Begin with a traceable sample
Identify the item, colour, specification revision, sample date and whether it is a stock, development or pre-production sample. Record how it relates to the proposed production fabric. Keep an approved reference and ask how the production batch will be linked to that approval.
For example, SM21001 lists 80/20 polyester/polyamide, 300 GSM, 30 × 30 cm and one piece per pack. Those fields are a starting checklist, not proof of the delivered composition or a published test tolerance. Verify the values using the agreed evidence and procedure.
Separate simple checks from formal tests
Dimensions, appearance, pack count and basic handling can form part of buyer screening. Measured fabric weight needs a defined conditioning and measurement procedure. Strength, pilling and other formal requirements should identify the relevant method, specimen preparation and acceptance rule.
A statement such as strong or durable is not an acceptance criterion. Ask the retailer or laboratory which test matches the actual risk and record the result units and conditions. This guide does not assert that SINOCLEAN operates an accredited textile laboratory.
Check washing changes and colour transfer
Record length and width before washing, prepare the sample according to the proposed care instructions, and measure again under the agreed post-wash condition. If reporting percentage change, calculate the after-minus-before dimension divided by the before dimension, multiplied by 100. Keep length and width results separate.
For colour questions, distinguish washing fastness, rubbing transfer and staining of another material. Agree the applicable method and grade requirement with the destination buyer. A casual white-cloth rub is only a screen; it is not a substitute for a formal fastness report. No shrinkage limit or fastness grade is published by this guide.
Match cleaning tests to the proposed label
For lint, absorption, drying or streaks, define the surface, preparation, water or cleaner, routine and decision rule. Where only water is proposed, test the actual soils covered by that claim. Do not infer disinfection or universal water-only cleaning from a visually clean surface.
For fluorescence-related requirements, agree what the claim means and which method or substances are relevant. For food-contact or antimicrobial claims, obtain evidence for the finished item, intended conditions and destination market. A fibre declaration, general supplier certificate or test on a different colour is not automatically sufficient.
| Risk or question | Evidence to request | Decision before production |
|---|---|---|
| Size or wash change | Measurements, care routine and calculation | Agree dimensional requirements and tolerances |
| Lint, uptake or drying | Labelled sample and repeatable comparison | Agree method and acceptance rule |
| Colour transfer, strength or pilling | Applicable test method and specimen-specific report | Agree grade or limit where needed |
| Food contact or antimicrobial wording | Finished-item evidence for intended market and use | Review the exact proposed claim before printing |
Keep inspection and claim evidence separate
Pre-shipment sampling and defect inspection answer whether the inspected lot meets the agreed inspection plan. They do not replace performance or compliance testing. The site describes AQL inspection, but buyers should still agree defect definitions, inspection scope and the sampling plan for their order.
The approval record should list the test, specimen identity, conditioning, method, units, result, acceptance limit, report date and responsible party. Mark unresolved fields as pending. If an artwork claim depends on a pending result, hold that claim for review rather than filling the gap with an assumed pass.
Example: documenting a dimension change
Suppose an illustrative sample measures 30.0 cm before a wash routine and 29.4 cm afterwards under the agreed measurement condition. The length change is (29.4 − 30.0) / 30.0 × 100 = −2.0%. A negative value means shrinkage in this calculation. This is a calculation example, not a factory shrinkage result or an acceptable limit.
Record the width change separately and retain the washing and drying instructions with the result. The buyer and supplier still need to agree an acceptance limit for the actual product. A single sample calculation cannot prove production consistency or establish that a factory uses pre-washing or heat setting.
Copy these fields into your enquiry or approval record
Approval reference: [item / colour / revision]. Tests required: [task and claim]. For each test record specimen, preparation, method, unit, acceptance limit, result, report date and responsible party. List pending items and artwork claims awaiting evidence.
Catalogue references and scope
The item specifications cited in this guide come from the linked SINOCLEAN catalogue entries. They identify the proposed products; they are not independent performance results. Sample routines and calculation examples are buyer guidance, not reports of completed factory or laboratory tests. Confirm the final specification and supporting evidence with the quotation.
Related reading: How can I compare microfiber absorbency, retained water and drying time? and Why does a microfiber cloth leave lint, and how should buyers check samples?.
Related technical and sourcing questions
- What evidence supports fluorescent-free or food-contact claims for a cleaning cloth?
- How should buyers check colourfastness and dye transfer in microfiber cloths?
- What should buyers verify about antimicrobial, odour-control or oil-repellent finishes?
- How do prewashing and setting relate to cleaning-cloth shrinkage and distortion?