Double Knit Test Methods and Acceptable Limits
Double Knit is verified through double jersey machine. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
double jersey machine defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Double Knit normally sit around 200-340 GSM in mainstream production. Note double jersey machine on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; 200-340 GSM is only meaningful for similar fabrics. Record elastane content alongside Double Knit, because blends shift the measured value. A result outside 200-340 GSM usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write 200-340 GSM with a stated tolerance, then verify against double jersey machine. Keeping reference values for Double Knit lets suppliers quote without extra sampling rounds. Ask for conditioning details together with double jersey machine, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Double Knit normally sit around 200-340 GSM in mainstream production. Note double jersey machine 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 Double Knit, because blends shift the measured value. A result outside 200-340 GSM usually points to process drift rather than to the fibre itself.
