Drying Rate Test Methods and Acceptable Limits
Drying Rate is verified through AATCC 199 drying rate. Knowing how the method works avoids rejecting fabric that actually meets the requirement.
Method overview
AATCC 199 drying rate defines sample size, conditioning and calculation, so values are comparable only within the same revision. Working figures for Drying Rate normally sit around under 30 minutes for lightweight knits in mainstream production. Note AATCC 199 drying rate on the tech pack so nobody tests against an older revision.
Result interpretation
Read the value together with construction notes; under 30 minutes for lightweight knits is only meaningful for similar fabrics. Record elastane content alongside Drying Rate, because blends shift the measured value. A result outside under 30 minutes for lightweight knits usually points to process drift rather than to the fibre itself.
Typical limits
Buyers commonly write under 30 minutes for lightweight knits with a stated tolerance, then verify against AATCC 199 drying rate. Keeping reference values for Drying Rate lets suppliers quote without extra sampling rounds. Ask for conditioning details together with AATCC 199 drying rate, since both affect the reading.
Sources of variation
Conditioning time, operator technique and shade all influence the result. Working figures for Drying Rate normally sit around under 30 minutes for lightweight knits in mainstream production. Note AATCC 199 drying rate 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 Drying Rate, because blends shift the measured value. A result outside under 30 minutes for lightweight knits usually points to process drift rather than to the fibre itself.
