AATCC 15 - Colorfastness to Perspiration
The AATCC Test Method 15 – Colorfastness to Perspiration is used to determine the colorfastness of a textile against perspiration. The pH of perspiration can impact the color of textile products- the primary performance component of high-visibility safety apparel and accessories.
The perspiration test is performed by taking a multifiber swatch of fabric and attaching it to a textile specimen of similar size. The specimen is then soaked in a solution made to mimic the pH and chemical make-up of perspiration. The specimens are weighed to fall within a controlled absorption percent that ensures that all specimens are subjected to the same conditions across all tests. The soaked specimens are then placed in between plates in a perspiration tester and a 10 lb weight is applied to compress them. The perspiration tester is placed in an oven at approximately 38 degrees Celsius for 6 hours, replicating the approximate body temperature.
Once removed, the specimens are conditioned in accordance with ASTM D1776. Both the multifiber swatch and textile specimen are examined in a lightbox under D65, artificial daylight. The AATCC Gray Scale for Staining is used to determine the color fastness to the six different fiber types on the multifiber swatch. The AATCC Gray Scale for Color Change is used to determine any change to the textile specimen when compared to the untested material. To pass, the specimen shall be at least a grade 3.0 for staining and a grade 4.0 for color change.