Pad-Batch Dyeing Test Methods and Acceptable Limits
Pad-Batch Dyeing is verified through padder plus rotating batch. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
padder plus rotating batch defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Pad-Batch Dyeing normally sit around for reactive dyes on cellulose in mainstream production. Note padder plus rotating batch on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; for reactive dyes on cellulose is only meaningful for similar fabrics. Record elastane content alongside Pad-Batch Dyeing, because blends shift the measured value. A result outside for reactive dyes on cellulose usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write for reactive dyes on cellulose with a stated tolerance, then verify against padder plus rotating batch. Keeping reference values for Pad-Batch Dyeing lets suppliers quote without extra sampling rounds. Ask for conditioning details together with padder plus rotating batch, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Pad-Batch Dyeing normally sit around for reactive dyes on cellulose in mainstream production. Note padder plus rotating batch on the tech pack so nobody tests against an older revision.
Documentation
Record the standard revision on every report, because older versions can differ from current practice. Record elastane content alongside Pad-Batch Dyeing, because blends shift the measured value. A result outside for reactive dyes on cellulose usually points to process drift rather than to the fibre itself.
