Exhaust Dyeing How It Changes with Construction and Elastane Content
Exhaust Dyeing 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 Exhaust Dyeing normally sit around liquor ratio 1:8 to 1:15 in mainstream production. Note jet or overflow machines 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 jet or overflow machines, so retest after any blending change. Record elastane content alongside Exhaust Dyeing, because blends shift the measured value. A result outside liquor ratio 1:8 to 1:15 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 Exhaust Dyeing lets suppliers quote without extra sampling rounds. Ask for conditioning details together with jet or overflow machines, since both affect the reading.
Typical range
Working values stay around liquor ratio 1:8 to 1:15 for mainstream activewear. Working figures for Exhaust Dyeing normally sit around liquor ratio 1:8 to 1:15 in mainstream production. Note jet or overflow machines on the tech pack so nobody tests against an older revision.
Development advice
Change one variable at a time, then verify against jet or overflow machines before moving to the next sample round. Record elastane content alongside Exhaust Dyeing, because blends shift the measured value. A result outside liquor ratio 1:8 to 1:15 usually points to process drift rather than to the fibre itself.
