CAN/CGSB-4.2 No. 19.1-2004 (R2013)

1. PURPOSE AND SCOPE 1.1 This method contains five accelerated tests for determining the colourfastness to washing of textile fabrics, threads and yarns. Each test is designed to produce in a single treatment the colour change to be expected after five average home or commercial washings under one of five commonly used sets of conditions. 1.2 The five tests contained in this method are: 1.2.1 Test No. 1 - For textile materials that are expected to withstand repeated hand washing, or equivalent gentle machine washing at lukewarm temperatures (40 ± 2°C). 1.2.2 Test No. 2 - For textile materials that are expected to withstand repeated machine washing at moderate temperatures (50 ± 2°C) in the home or in a commercial laundry. 1.2.3 Test No. 3 - For textile materials that are expected to withstand repeated machine washing at high temperatures (70 ± 2°C) without bleach, in the home or in a commercial laundry. 1.2.4 Test No. 4 - For textile materials that are expected to withstand repeated machine washing at high temperatures (70 ± 2°C) in the presence of hypochlorite bleach, in the home or in a commercial laundry. 1.2.5 Test No. 5 - For textile materials that are expected to withstand repeated hand washing, or equivalent gentle machine washing at cool temperatures (30° ± 2°C). 1.3 The testing and evaluation of a product against this method may require the use of materials and/or equipment that could be hazardous. This document does not purport to address all the safety aspects associated with its use. Anyone using this method has the responsibility to consult the appropriate authorities and to establish appropriate health and safety practices in conjunction with any applicable regulatory requirements prior to its use.