Scouring Test Methods and Acceptable Limits
Scouring is verified through alkaline scouring process. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
alkaline scouring process defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Scouring normally sit around before bleaching or dyeing in mainstream production. Note alkaline scouring process on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; before bleaching or dyeing is only meaningful for similar fabrics. Record elastane content alongside Scouring, because blends shift the measured value. A result outside before bleaching or dyeing usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write before bleaching or dyeing with a stated tolerance, then verify against alkaline scouring process. Keeping reference values for Scouring lets suppliers quote without extra sampling rounds. Ask for conditioning details together with alkaline scouring process, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Scouring normally sit around before bleaching or dyeing in mainstream production. Note alkaline scouring process on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Scouring, because blends shift the measured value. A result outside before bleaching or dyeing usually points to process drift rather than to the fibre itself.
