Fleece Brush Back How It Changes with Construction and Elastane Content
Fleece Brush Back 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 Fleece Brush Back normally sit around 260-340 GSM in mainstream production. Note raising machine 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 raising machine, so retest after any blending change. Record elastane content alongside Fleece Brush Back, because blends shift the measured value. A result outside 260-340 GSM 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 Fleece Brush Back lets suppliers quote without extra sampling rounds. Ask for conditioning details together with raising machine, since both affect the reading.
Typical range
Working values stay around 260-340 GSM for mainstream activewear. Working figures for Fleece Brush Back normally sit around 260-340 GSM in mainstream production. Note raising machine on the tech pack so nobody tests against an older revision.
Development advice
Change one variable at a time, then verify against raising machine before moving to the next sample round. Record elastane content alongside Fleece Brush Back, because blends shift the measured value. A result outside 260-340 GSM usually points to process drift rather than to the fibre itself.
