AATCC 190:2016 pdf download.Colorfastness to Home Laundering with Activated Oxygen Bleach Detergent: Accelerated
1. Purpose and Scope
1.1 This test method is a diagnostic test intended to screen dyed cotton textiles sensitive to oxygen bleach detergents. It provides an accelerated procedure to assess the shade changes of dyed textiles when exposed to activated oxygen bleach detergent (simulating multiple home launderings, typically 10 or more). This procedure is most appropriately used during the dye selection process. prior to the production of washable textiles.
1.2 This method does not rellect the contribution to shade change of optical brighteners, which are present in some commercial washing products, or finishes that may be applied to the textile during production.
2. Principle
2.1 A specimen of the dyed textile is laundered, rinsed, and dried. Specimens are tested under defined conditions of temperature. bleach concentration and Lime to assess whether fading will occur after multiple home launderings. The color difference between the test specimen and the original textile is assessed instrumentally or visually.
3. Terminology
3.1 activated oxygen bleach, n.—a bleaching system comprising an oxygen bleach and a bleach activator.
3.2 bleach activator, n.—a bleach agent precursor, which converts a less potent bleaching species into a more powerful one.
3.3 colorfastness, n.—the resistance of a material to change in any of its color characteristics, to transfer of its colorant(s) to adjacent materials, or both, as a result of the exposure of the material to any environment that might be encountered during the processing. testing, storage or use of the material.
3.4 laundering, n.—of e.vtile matedals. a process intended to remove soils and/or stains by treatment (washing) with an aqueous detergent solution and normally including subsequent rinsing, cx-tracting and drying.
3.5 oxygen bleach, n.- a bleach agent which can liberate hydrogen peroxide by hydrolysis upon dissolving in water.AATCC 190 pdf download.