Purpose of Test Chemists use this test to determine whether the dyed or printed color on various fabrics will stand up to acid perspiration. It is designed for various fabrics, including: Yarn Dyestuffs Colored fibers Printed fibers Terminology Defined Colorfastness — Colorfastness is a fabric’s ability to retain color in various conditions. Simulated acid perspiration… Continue reading AATCC 15 Colorfastness to Perspiration