Pilling Resistance Test Methods and Acceptable Limits
Pilling Resistance is verified through ISO 12945-2 pilling box. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ISO 12945-2 pilling box defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Pilling Resistance normally sit around grade 4 after 7000 revolutions in mainstream production. Note ISO 12945-2 pilling box on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; grade 4 after 7000 revolutions is only meaningful for similar fabrics. Record elastane content alongside Pilling Resistance, because blends shift the measured value. A result outside grade 4 after 7000 revolutions usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write grade 4 after 7000 revolutions with a stated tolerance, then verify against ISO 12945-2 pilling box. Keeping reference values for Pilling Resistance lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 12945-2 pilling box, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Pilling Resistance normally sit around grade 4 after 7000 revolutions in mainstream production. Note ISO 12945-2 pilling box 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 Pilling Resistance, because blends shift the measured value. A result outside grade 4 after 7000 revolutions usually points to process drift rather than to the fibre itself.
