Cover Factor How to Read It on a Lab Report
Laboratory reports present Cover Factor in a compact format. Knowing what each line means prevents misreading.
Definition reminder
how completely yarns close the fabric surface. 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.
Common report layout
The report states method calculated from yarn and density, sample description, conditioning, and the measured result. 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.
Typical result
Values near higher is more opaque usually indicate a conforming lot, assuming the fabric matches the sample submitted. 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.
Red flags
Missing revision numbers, unusual conditioning, and results without units all signal unreliable data. 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.
Questions to ask
Ask the laboratory for the standard revision and sample description before accepting or rejecting a result. 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.
