Anti-Static Finish Test Methods and Acceptable Limits
Anti-Static Finish is verified through EN 1149 surface resistance. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
EN 1149 surface resistance defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Anti-Static Finish normally sit around below 1E11 ohms in mainstream production. Note EN 1149 surface resistance on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; below 1E11 ohms is only meaningful for similar fabrics. Record elastane content alongside Anti-Static Finish, because blends shift the measured value. A result outside below 1E11 ohms usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write below 1E11 ohms with a stated tolerance, then verify against EN 1149 surface resistance. Keeping reference values for Anti-Static Finish lets suppliers quote without extra sampling rounds. Ask for conditioning details together with EN 1149 surface resistance, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Anti-Static Finish normally sit around below 1E11 ohms in mainstream production. Note EN 1149 surface resistance 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 Anti-Static Finish, because blends shift the measured value. A result outside below 1E11 ohms usually points to process drift rather than to the fibre itself.
