Four-Way Stretch Specification Targets for Buyers
Setting Four-Way Stretch correctly on a tech pack prevents most later disputes. Targets belong on the page before the first fabric sample.
Where to write it
Place Four-Way Stretch next to composition and weight so all three are quoted as one package. Working figures for Four-Way Stretch normally sit around 30-60% typical extension in mainstream production. Note ISO 13934-1 cyclic extension on the tech pack so nobody tests against an older revision.
Reference level
Typical activewear expectation: 30-60% typical extension. Record elastane content alongside Four-Way Stretch, because blends shift the measured value. A result outside 30-60% typical extension usually points to process drift rather than to the fibre itself.
Tolerances that work
Allow a small tolerance rather than a fixed number, since normal process variation exists in every lot. Keeping reference values for Four-Way Stretch lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 13934-1 cyclic extension, since both affect the reading.
Verification method
Confirm with ISO 13934-1 cyclic extension and keep the report against the bulk record. Working figures for Four-Way Stretch normally sit around 30-60% typical extension in mainstream production. Note ISO 13934-1 cyclic extension on the tech pack so nobody tests against an older revision.
Commercial note
Tightening beyond practical need raises cost without improving garment life, so set the tightest target only where it protects the customer. Record elastane content alongside Four-Way Stretch, because blends shift the measured value. A result outside 30-60% typical extension usually points to process drift rather than to the fibre itself.
