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Analysis of the experimental process of color fastness to perspiration
1. The significance of the perspiration color fastness test The perspiration color fastness tester is used to test the color fastness to perspiration of various textile materials and textiles and to determine the color fastness of various colored and colored textiles to sweat, sea water, saliva, distilled water, etc. Degree of performance. Since the color fastness of textiles is affected by many factors, what about the color fading and fading of the fabric under different physical and chemical conditions? These are the topics that textile companies need to pay attention to. This article engineers will focus on the test methods of perspiration color fastness. 2. Purpose and scope This test method is used to judge the fastness of colored fabrics to sweat. It can be used for dyeing, printing and other colored textile fibers, yarns and various fabrics. It can also be used to test dyes on fabrics. The work of the committee shows that this type of test is related to a limited area of u200bu200bresearch. Before conducting the test, perform acid and alkali tests. Then, the results of the study show that the alkali test can be cancelled. The background information on the work of the RA52 committee and the decision to cancel the alkaline test were published in two articles: 'Color fastness to sweat and chemicals' on textile pharmacists and colorists (1974.10) And 'Evaluation of color fastness to perspiration, laboratory and wearing tests' (1974.11). Although this method has eliminated the alkaline test, it is still necessary for some occasions or some specific purposes in foreign trade. In these situations, the alkaline test must be carried out in accordance with 1973 AATCC Method 15. For ease of reference, the composition of the alkaline solution is stated in 12.7. 3. Regularly colored textile samples are soaked in a sweat-like solution. Under the condition of fixed device pressure, you can slowly increase the temperature and dry slowly. 4. Apparatus and materials Sweat tester, sweat meter or related devices (plastic and glass plates equipped with the equipment) (see 12.1). Oven-convection type. Multi-fiber test fabric or FA (see 12.2). Color transmission scale or natural color pollution measurement scale (see 12.3). The true color scale of the test color change (see 12.3). Roller (see 12.4). 5. The acidic solution is made into one liter with distilled water: 10 grams of sodium chloride, 1 gram of lactic acid, USP 85%, 1 gram of Na2HPO4, 0.25 grams of ammonium chloride monohydrate. (See 12.5) The pH value of the solution must be 4.3 ± 0.2, measured with an accurate pH meter. It is best not to use pH test paper, because the accuracy of the pH test paper is not good. If the pH of the prepared acid solution exceeds the range of 4.1-4.5, it must be prepared again to ensure the accuracy of the ingredients weighing. 6. Safety precautions: these safety precautions are for understanding only. This precaution is subordinate to the testing program and does not necessarily have to be included. When handling materials with this test method, it is the user’s responsibility to use safe and correct techniques. The producer must consider some special details, such as the material safety data sheet and other producer’s suggestions. All OSHA standards and regulations must be Consider and follow. Good laboratory operation rules must be followed, and safety glass must be installed in all areas of the laboratory. All chemicals must be handled with care. Observe the safety of the drier, especially at the pinch point. For more information about the Perspiration Fastness Tester: http://www.selaoduyi.com/newslist/list-3-1.html
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