Colour Fastness to Perspiration Why Shipments Get Rejected Over This
Many disputes come down to Colour Fastness to Perspiration. Below is what inspectors check and why shipments fail.
The core definition
colour stability against acidic and alkaline sweat. Working figures for Colour Fastness to Perspiration normally sit around grade 4 minimum in mainstream production. Note ISO 105-E04 perspiration on the tech pack so nobody tests against an older revision.
Most common cause of failure
Results usually fall outside grade 4 minimum because the target was never written into the order. Record elastane content alongside Colour Fastness to Perspiration, because blends shift the measured value. A result outside grade 4 minimum usually points to process drift rather than to the fibre itself.
How it is checked
Inspection and laboratory work both refer to ISO 105-E04 perspiration. Keeping reference values for Colour Fastness to Perspiration lets suppliers quote without extra sampling rounds. Ask for conditioning details together with ISO 105-E04 perspiration, since both affect the reading.
Related faults
it protects light-coloured adjacent panels, so related complaints often point back to this single parameter. Working figures for Colour Fastness to Perspiration normally sit around grade 4 minimum in mainstream production. Note ISO 105-E04 perspiration on the tech pack so nobody tests against an older revision.
Avoiding rejection
Agree targets, tolerances and the method before production, then test per lot rather than per shipment. Record elastane content alongside Colour Fastness to Perspiration, because blends shift the measured value. A result outside grade 4 minimum usually points to process drift rather than to the fibre itself.
