Two-Way Stretch Test Methods and Acceptable Limits
Two-Way Stretch is verified through ASTM D6614 stretch woven test. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
ASTM D6614 stretch woven test defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Two-Way Stretch normally sit around 20-40% typical in mainstream production. Note ASTM D6614 stretch woven test on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; 20-40% typical is only meaningful for similar fabrics. Record elastane content alongside Two-Way Stretch, because blends shift the measured value. A result outside 20-40% typical usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write 20-40% typical with a stated tolerance, then verify against ASTM D6614 stretch woven test. Keeping reference values for Two-Way Stretch lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ASTM D6614 stretch woven test, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Two-Way Stretch normally sit around 20-40% typical in mainstream production. Note ASTM D6614 stretch woven test 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 Two-Way Stretch, because blends shift the measured value. A result outside 20-40% typical usually points to process drift rather than to the fibre itself.
