Bleaching Frequently Asked Questions
Short answers to the questions buyers ask most often about Bleaching.
What does it mean?
removing natural colour before dyeing. Working figures for Bleaching normally sit around hydrogen peroxide route in mainstream production. Note controlled pH and temperature on the tech pack so nobody tests against an older revision.
What value should be specified?
Start from hydrogen peroxide route and adjust for the end use of the garment. Record elastane content alongside Bleaching, because blends shift the measured value. A result outside hydrogen peroxide route usually points to process drift rather than to the fibre itself.
How is it tested?
controlled pH and temperature. Keeping reference values for Bleaching lets suppliers quote without extra sampling rounds. Ask for conditioning details together with controlled pH and temperature, 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 Bleaching normally sit around hydrogen peroxide route in mainstream production. Note controlled pH and temperature 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 Bleaching, because blends shift the measured value. A result outside hydrogen peroxide route usually points to process drift rather than to the fibre itself.
