Water Repellency Spray Test How It Changes with Construction and Elastane Content
Water Repellency Spray Test does not stay constant when construction changes. Understanding the direction of change helps during development.
Effect of knit structure
Loop length and density move results first, usually before any yarn change is made. Working figures for Water Repellency Spray Test normally sit around grade 4 to 5 target in mainstream production. Note AATCC 22 spray test on the tech pack so nobody tests against an older revision.
Effect of elastane content
More elastane raises recovery but changes the value measured by AATCC 22 spray test, so retest after any blending change. Record elastane content alongside Water Repellency Spray Test, because blends shift the measured value. A result outside grade 4 to 5 target usually points to process drift rather than to the fibre itself.
Effect of finishing
Heat setting and softeners shift results, which explains differences between a hand sample and bulk. Keeping reference values for Water Repellency Spray Test lets suppliers quote without extra sampling rounds. Ask for conditioning details together with AATCC 22 spray test, since both affect the reading.
Typical range
Working values stay around grade 4 to 5 target for mainstream activewear. Working figures for Water Repellency Spray Test normally sit around grade 4 to 5 target in mainstream production. Note AATCC 22 spray test on the tech pack so nobody tests against an older revision.
Development advice
Change one variable at a time, then verify against AATCC 22 spray test before moving to the next sample round. Record elastane content alongside Water Repellency Spray Test, because blends shift the measured value. A result outside grade 4 to 5 target usually points to process drift rather than to the fibre itself.
