Elastic Recovery Test Methods and Acceptable Limits
Elastic Recovery is verified through ISO 13934-1 recovery loop. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ISO 13934-1 recovery loop defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Elastic Recovery normally sit around above 90% after cycling in mainstream production. Note ISO 13934-1 recovery loop on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; above 90% after cycling is only meaningful for similar fabrics. Record elastane content alongside Elastic Recovery, because blends shift the measured value. A result outside above 90% after cycling usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write above 90% after cycling with a stated tolerance, then verify against ISO 13934-1 recovery loop. Keeping reference values for Elastic Recovery lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13934-1 recovery loop, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Elastic Recovery normally sit around above 90% after cycling in mainstream production. Note ISO 13934-1 recovery loop 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 Elastic Recovery, because blends shift the measured value. A result outside above 90% after cycling usually points to process drift rather than to the fibre itself.
