GOTS Certification Test Methods and Acceptable Limits
GOTS Certification is verified through Control Union or equivalent audit. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
Control Union or equivalent audit defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for GOTS Certification normally sit around minimum 70% organic fibre in mainstream production. Note Control Union or equivalent audit on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; minimum 70% organic fibre is only meaningful for similar fabrics. Record elastane content alongside GOTS Certification, because blends shift the measured value. A result outside minimum 70% organic fibre usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write minimum 70% organic fibre with a stated tolerance, then verify against Control Union or equivalent audit. Keeping reference values for GOTS Certification lets suppliers quote without extra sampling rounds. Ask for conditioning details together with Control Union or equivalent audit, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for GOTS Certification normally sit around minimum 70% organic fibre in mainstream production. Note Control Union or equivalent audit 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 GOTS Certification, because blends shift the measured value. A result outside minimum 70% organic fibre usually points to process drift rather than to the fibre itself.
