Squat-Proof Opacity Frequently Asked Questions
Short answers to the questions buyers ask most often about Squat-Proof Opacity.
What does it mean?
resistance to becoming see-through under stretch. Working figures for Squat-Proof Opacity normally sit around above 96% opacity in mainstream production. Note AATCC 183 transmission with photography on the tech pack so nobody tests against an older revision.
What value should be specified?
Start from above 96% opacity and adjust for the end use of the garment. Record elastane content alongside Squat-Proof Opacity, because blends shift the measured value. A result outside above 96% opacity usually points to process drift rather than to the fibre itself.
How is it tested?
AATCC 183 transmission with photography. Keeping reference values for Squat-Proof Opacity lets suppliers quote without extra sampling rounds. Ask for conditioning details together with AATCC 183 transmission with photography, since both affect the reading.
Why does it change between lots?
Process variables such as finishing temperature and elastane batch cause the normal spread of results. Working figures for Squat-Proof Opacity normally sit around above 96% opacity in mainstream production. Note AATCC 183 transmission with photography on the tech pack so nobody tests against an older revision.
Can results be compared across suppliers?
Only when the same standard revision and conditioning are used; otherwise measurements are not equivalent. Record elastane content alongside Squat-Proof Opacity, because blends shift the measured value. A result outside above 96% opacity usually points to process drift rather than to the fibre itself.
