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