Four-Way Stretch Why Shipments Get Rejected Over This
Many disputes come down to Four-Way Stretch. Below is what inspectors check and why shipments fail.
The core definition
extension in both length and width. 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.
Most common cause of failure
Results usually fall outside 30-60% typical extension because the target was never written into the order. 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.
How it is checked
Inspection and laboratory work both refer to ISO 13934-1 cyclic extension. 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.
Related faults
it defines how freely a garment moves, so related complaints often point back to this single parameter. 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.
Avoiding rejection
Agree targets, tolerances and the method before production, then test per lot rather than per shipment. 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.
