Download AATCC Technical Manual by American Assoc. of Textile Chemists and Colorists PDF

By American Assoc. of Textile Chemists and Colorists

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1 This test method determines the efficiency of ordinary commercial wetting agents. 2. 1 A weighted cotton test skein is dropped into a tall cylinder containing a water solution of a wetting agent. The time required for a string stirrup connecting the weight and the skein to relax is recorded as the sinking time. 3. —a chemical compound which when added to water lowers both the surface tension of the liquid and its interfacial tension against the solid material. 4. Safety Precautions NOTE: These safety precautions are for information purposes only.

31. 5). 5). 3 ASTM G 151, Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources. 19). 19). 19). 20). 32. I. I. 73801). Each resultant higher numbered standard is twice as colorfast as the preceding numbered standard. 5). 2 Black Thermometers are used to control an artificial weathering device and to provide an estimate of the maximum temperature of samples exposed to a radiant energy source. There are two types of Black Thermometers. One type is referred to as a “Black Panel Thermometer” which is uninsulated and is made of metal.

This range of concentrations is sufficient for the study of any commercial product. 7. 1 The diluted solution for test is poured from the liter volumetric flask into a 1500 mL beaker to ensure mixing. The solution in the beaker is then divided equally between two 500 mL graduated cylinders. If the more dilute solutions are tested first, the mixing beaker and cylinders need not be rinsed out and dried each time. The operator must wait after the cylinders have been filled until all bubbles below the surface of the solution have risen to the top before the sinking tests are made.

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