AATCC 162-2002 Colorfastness to Water: Chlorinated Pool

AATCC 162-2002 Colorfastness to Water: Chlorinated Pool. 7. Test Specimens 7.1 Colored specimens, approximately 6 × 6 cm. Total weight of test specimens should be 5.0 ± 0.25 g. If specimens to be tested do not weigh 5.0 g, add multiple specimens to make 5.0 g. Include the Test Control Fabric in the 5.0 g weight. Dif- ferent colored specimens can be mixed when making up the 5.0 g load. 8. Procedure 8.1 Purge the drycleaning cylinder. Add approximately 5000 mL deionized water and 0.5 mL Clorox or equivalent (see 11.4). Close cylinder and run for 10 min (purging is necessary only if cylinder has been used for testing other than chlo- rinated pool water, or has not been used for a period of two weeks). Discard this solution. 8.2 Prepare hardness concentrate. 8.2.1 Weigh out 8.24 g calcium chloride, anhydrous. 8.2.2 Weigh out 5.07 g magnesium chloride hexahydrate, MgCl 2 · 6 H 2 O. 8.2.3 Add 800 mL deionized or distilled water to a 1 L volumetric flask; add calcium chloride and magnesium chloride while stirring to dissolve. Bring vol- ume up to 1 L with water. This is a “hard- ness concentrate” which can be retained and used for 30 days. 8.3 Dilute 51 mL hardness concentrate to 5100 mL with deionized or distilled water. Add 0.5 mL Clorox or equivalent which is no more than 60 days old. Determine actual ppm Cl by titration and ad- just to 5 ppm (see 11.8). 8.3.1 0.01N Sodium thiosulfate can be purchased in this form or can be diluted 10 to 1 volumetrically from 0.1N solution. 8.4 Adjust solution to pH 7.0 with sodium carbonate or acetic acid as necessary. 8.5 Place the 5000 mL solution (from 8.3) in the cylinder of the testing machine. Adjust temperature to 21°C (70°F). 8.6 Place colored test specimens including test control fabric in cylinder, close and tumble for 60 min. 8.7 Remove the test specimens and pass through wringer to remove excess solution. Rinse thoroughly with deion- ized or distilled water. Wring again and allow to dry on absorbent, bleached paper toweling at room temperature.AATCC 162 pdf download.