AATCC 15-2007 Colorfastness to Perspiration.
9.1 Place each test specimen (as prepared in 8.1 and 8.2) in a 9 cm diameter. 2 cm deep peni dish. Add freshly prepared perspiration solution to a depth of 1.5 cm in the petri dish. Soak the test specimen in the solution for 30 ± 2 mm with occasional agitation and squeezing to ensure complete wetting. For fabrics hard to wet out, alternately wet the specimen and pass it through the wringer until it is completely penetrated by the solution.
9.2 After 30 ± 2 mm. pass each test specimen assembly through the wringer with the multifiber stripes perpendicular to the length of the wringer rolls (all stripes go through the wringer at the same time). Weigh each test specimen to be sure it weiis 2.25 * 0.05 times its oiiginal weight. Because certain fabrics may not be able to retain this amount of solution when passing through a wringer. such fabrics may be tested after blotting to the required wet pickup with White AATCC Blotting Paper (see 13.4). To obtain consistent results all specimens of a given construction in a tcst series should have identical pickup. as the degree of staining increases with the amount of retained solution.
9.3 Place each test specimen assembly on a marked plexiglass or glass plate with the multiliher stripes running perpendicular to the long dimension of the plate.
9.4 Depending upon equipment available, use the following alternates:
9.4.1 AATCC Perspiration Tester:
Place the plates in the perspiration Lester with the specimen assemblies evenly dis trihuted between the 21 plates. Place all 21 plates into the unit regardless of the number of specimens. After placing the final plate in position (on top) set the dual plates with compensating springs in position, place the 3.63 kg (8.0 Ib) weight on top making a total of 4.54 kg (10.0 1b) under the pressure plate. and lock the pressure plate in position by turning the thumb screws. Remove the weight and place the unit lying on its side in the oven.
9.4.2 Perspirometer: Assemble the plates in the perspiration tester with the specimens evenly distributed between the 21 plates. Place all 21 plates into the unit regardless of the number of specimens. The plates are held in a vertical position between an indicating scale with a fixed metal plate at one end and an adjustable metal plate at the other end. Use the adjusting screw to exert a 4.54 kg (10.0 Ib) force against the plates. Lock the specimen unit containing the test specimens with a set screw. Remove the pressure gauge unit from the specimen unit and place the specimen unit in the oven. Another specimen unit may he added to the pressure gauge unit and the loading procedure repeated.
9.5 Heat the loaded specimen unit in anovenat38± l°’(l0O±2°F)for6h± 5 mm. Check the oven temperature periodically to be sure it remains at the specifled temperature throughout the test.
9.6 Remove the tester from the oven and for each test specimen assembly. separate the multit’iber fabric and, if used, the adjacent fabric from the test fabric. Place the multifiber fabric and test fabric specimens separately on a wire screen in a conditioned atmosphere (21 ± 1°C, 65 ± 5% RH) overnight.AATCC 15 pdf download.