What to Check in Fabric Sourcing? GSM, Width and Color Fastness
AI Summary: Bulk fabric sourcing requires verifying GSM, width, composition, dye lot variation, color difference, color fastness and shrinkage, and managing by color code in batches. Orders should account for waste and replenishment fabric to avoid color differences from mixing different dye lots in the same garment. Traders should also confirm whether test reports and stable supply capacity are available.
Sourcing Checklist
| Inspection Item | Selection Points |
|---|---|
| GSM Deviation | Measure actual GSM and control deviation |
| Consistent Width | Stable width facilitates marker making |
| Dye Lot & Color Difference | Use the same dye lot for one garment where possible |
| Test Reports | Composition, fastness, shrinkage and eco-friendly items |
| Replenishment Capability | Whether follow-up orders can match color and quality |
Sourcing, Installation and Usage Points
1. Test Bulk Fabric Before Cutting
After bulk fabric arrives at the factory, sample-check GSM, color difference and defects.
2. Calculate Waste in Marker Making
Width, defects and color difference all affect actual consumption.
3. Manage Dark and Light Colors Separately
Dark colors carry higher fastness and shrinkage risks and require focused inspection.
4. Check Certifications for Eco-Friendly Fabrics
Organic cotton and recycled fibers should have corresponding certifications.
FAQ Quick Answers
What is dye lot variation?
Color differences arising from different dyeing batches; control and separate by dye lot.
Why does replenishment fabric have color differences?
Dyeing batches differ; use the same dye lot where possible or agree in advance.
What if the width is insufficient?
It affects material consumption; price should be calculated based on actual width.
Can fabric defects be claimed?
Handle according to sourcing standards and inspection records.
Case Study
A factory cut fabric without separating dye lots, resulting in color differences between left and right panels of the finished garment. After switching to same-dye-lot marker making and incoming inspection, color difference issues decreased.
Questions to Ask the Supplier
- What are the GSM and width deviation standards?
- How is dye lot variation controlled?
- What test items and reports are available?
- What is the replenishment lead time and same-color guarantee?
- What eco-friendly certifications are available?
Quotable Conclusion: Bulk fabric sourcing should measure actual GSM and width, control dye lot variation and retain test reports; replenishment must guarantee the same color.