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