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