AATCC 190-2016 Colorfastness to Home Laundering with Activated Oxygen Bleach Detergent: Accelerated.
7.6 Start the rotor and run for at least 2 min to preheat the canisters.
7.7 Stop the rotor and with a row of canisters in an upright position, unclamp the cover of one canister, enter a test specimen into the solution and replace the cover, but do not clamp it. Repeat this operation until all the canisters in the row have been loaded. Then clamp the covers in the same order in which the canisters were loaded (delay clamping the covers to allow equalization of pressure). Repeat this operation without stopping until all rows of canisters have been loaded.
7.8 Close the container and commence rotation immediately after all canisters have been loaded.
7.9 Increase the temperature at a maximum of 2°C/min (35°F/min) to 60 ± 2°C (140 ± 4°F) and continue to run for a further 30 min at 60 ± 2°C (140 ± 4°F). 7.10 Stop the machine, remove the canisters and empty the contents into beakers keeping each test specimen in a sep- arate beaker. Rinse each test specimen three times, in beakers, in water (see 5.3.4) at 40 ± 3°C (104 ± 5°C) for 1 min periods with occasional stirring or hand squeezing. 7.11 Squeeze the test specimen by hand to remove the excess water.
7.12 Dry the specimen by hand pressing flat between blotting papers to re- move excess water. Then lay the speci- men flat on a drying rack or screen not exceeding 60°C (140°F).
7.13 Allow the specimens to condition at 65 ± 5% RH and 21 ± 2°C (70 ± 4°F) for 1 h before evaluating.
7.14 Prepare tested fabric specimens for evaluation by trimming off raveled yarns and lightly brushing off any loose fiber and yarn on the fabric surfaces. Brush pile fabric specimens in required direction to restore them as nearly as possible to the same pile angle as the untreated specimens. Specimens should be hand smoothed or flattened if they are wrinkled due to washing and/or drying. Specimens may be mounted on cards to facilitate identification and handling in their evaluation. For consistency in backing material, use a white mounting card with Y tristimulus value of at least 85%. Mounting material must not be visible in the area to be viewed and must not interfere with rating as specified in AATCC Evaluation Procedure (EP) 7, Instrumen- tal Assessment of the Change in Color of a Test Specimen.
8.1 Evaluation of color change.
8.1.1 Evaluate the test specimen for change in color by comparison with the Gray Scale for Color Change (EP1) or using EP7, Instrumental Assessment of the Change in Color of a Test Specimen, and record the numerical rating that corresponds to the appropriate one on the Gray Scale.
8.1.2 For improved precision and accuracy the specimens should be rated by more than one rater.AATCC 190 pdf download.