Anti-Static Finish How It Changes with Construction and Elastane Content
Anti-Static Finish does not stay constant when construction changes. Understanding the direction of change helps during development.
Effect of knit structure
Loop length and density move results first, usually before any yarn change is made. 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.
Effect of elastane content
More elastane raises recovery but changes the value measured by EN 1149 surface resistance, so retest after any blending change. 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.
Effect of finishing
Heat setting and softeners shift results, which explains differences between a hand sample and bulk. 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.
Typical range
Working values stay around below 1E11 ohms for mainstream activewear. 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.
Development advice
Change one variable at a time, then verify against EN 1149 surface resistance before moving to the next sample round. 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.
