Knowledge Library
Textile Testing Requirements: What Brands Need to Know
Why textile testing exists
Textile testing verifies that a fabric will perform as intended and comply with the rules of the markets it will sell into. It sits between fabric selection and production, catching problems while they are cheap to fix. Testing matters because a fabric that looks and feels right can still fail in ways that only appear later — colour that bleeds, seams that fail, a hand that changes after washing. Testing turns those risks into known quantities before a brand commits to production.
Performance tests
The core performance tests assess how a fabric behaves in use. Colourfastness checks whether colour holds against washing, light, and rubbing. Dimensional stability (shrinkage) checks whether the garment holds its size after laundering. Pilling and abrasion resistance assess durability. Tensile and seam strength check that the fabric and its construction can withstand stress. Each of these maps to a real customer complaint if it fails, which is why they are worth verifying before a style goes into production rather than after returns start.
Compliance and safety tests
Beyond performance, some tests are about legal compliance and safety. Flammability testing is mandatory for certain categories — notably childrenswear and sleepwear — and dictates whether a fabric can even be used for them. Restricted-substance testing verifies that dyes and finishes meet chemical regulations such as REACH in the EU. Fibre-content verification confirms that the composition matches what will be disclosed on the label. These tests are not optional where they apply; failing them can hold a shipment or force a withdrawal.
When to test
Timing matters as much as the tests themselves. Testing should happen at fabric approval — before a brand commits fabric to production — so that a failure changes a sourcing decision rather than scrapping finished goods. For ongoing production, periodic testing guards against a supplier's quality drifting over time. Testing late, on finished garments, is the expensive path: by then a failure means lost production, not just a different fabric choice. The discipline is to test early and treat the results as a gate, not a formality.
Building testing into development
Practically, decide your required tests based on category and target markets before you approve fabric, because childrenswear, sleepwear, and certain markets impose non-negotiable tests. Keep test reports with the tech pack so they travel with the garment through production and into compliance documentation. Standardise your requirements across styles so testing becomes routine rather than a per-style scramble. A brand that builds testing into fabric approval rarely faces a late failure; one that tests at the end regularly does. Lyons Intel flags category- and market-specific testing requirements during development so they are planned, not discovered.