Two-Way Stretch Frequently Asked Questions
Short answers to the questions buyers ask most often about Two-Way Stretch.
What does it mean?
extension mainly across the width. 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.
What value should be specified?
Start from 20-40% typical and adjust for the end use of the garment. 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.
How is it tested?
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.
Why does it change between lots?
Process variables such as finishing temperature and elastane batch cause the normal spread of results. 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.
Can results be compared across suppliers?
Only when the same standard revision and conditioning are used; otherwise measurements are not equivalent. 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.
