Fabric Growth Test Methods and Acceptable Limits
Fabric Growth is verified through ASTM D2594 stretch properties. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ASTM D2594 stretch properties defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Fabric Growth normally sit around below 6% target in mainstream production. Note ASTM D2594 stretch properties on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; below 6% target is only meaningful for similar fabrics. Record elastane content alongside Fabric Growth, because blends shift the measured value. A result outside below 6% target usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write below 6% target with a stated tolerance, then verify against ASTM D2594 stretch properties. Keeping reference values for Fabric Growth lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ASTM D2594 stretch properties, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Fabric Growth normally sit around below 6% target in mainstream production. Note ASTM D2594 stretch properties 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 Fabric Growth, because blends shift the measured value. A result outside below 6% target usually points to process drift rather than to the fibre itself.
