Restricted Substances List (RSL) How It Changes with Construction and Elastane Content
Restricted Substances List (RSL) 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 Restricted Substances List (RSL) normally sit around reviewed each season in mainstream production. Note brand-specific published list 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 brand-specific published list, so retest after any blending change. Record elastane content alongside Restricted Substances List (RSL), because blends shift the measured value. A result outside reviewed each season 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 Restricted Substances List (RSL) lets suppliers quote without extra sampling rounds. Ask for conditioning details together with brand-specific published list, since both affect the reading.
Typical range
Working values stay around reviewed each season for mainstream activewear. Working figures for Restricted Substances List (RSL) normally sit around reviewed each season in mainstream production. Note brand-specific published list on the tech pack so nobody tests against an older revision.
Development advice
Change one variable at a time, then verify against brand-specific published list before moving to the next sample round. Record elastane content alongside Restricted Substances List (RSL), because blends shift the measured value. A result outside reviewed each season usually points to process drift rather than to the fibre itself.
