AQL 2.5 inspection per ASTM D5430 4-point system: ANSI/ASQ Z1.4 sampling tables, defect grading, >40 pts/100 yd² reject threshold.
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Delta E color matching fabric: CIEDE2000 dE <1.0 tolerance, spectrophotometer lab dip workflow, D65 metamerism control.
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Seamless activewear 2026: raw-cut edges need non-curling air-layer fabric. D083 balanced knit stops edge curl.
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Chlorine resistant fabric test: D036 Polyester/PBT vs Nylon/Spandex 100h at 5ppm Cl, AATCC TM162 data, <5% vs 45% elasticity loss.
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Recycled nylon vs virgin PA66: 15-30% tensile loss (ASTM D5034) at 12-18% cost premium. GRS-certified China sourcing analysis.
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