Analysis of the experimental process of color fastness to perspiration1

1. The meaning of perspiration color fastness test The perspiration color fastness tester is used to test the color fastness of various textile materials and textiles to perspiration and to determine the color fastness of various colored and colored textiles to perspiration, seawater, saliva, distilled water, etc. degree of performance. Since there are many factors that affect the color fastness of textiles, what is the color fading and fading of fabrics under different physical and chemical conditions? These are topics that textile enterprises need to pay attention to. The engineer of this article (Hong Kong) Co., Ltd. will focus on the experimental method of color fastness to perspiration. 2. Purpose and scope This test method is used to judge the perspiration fastness of colored fabrics. 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 committee's work has shown that this test is relevant to limited field research. Acid and alkalinity tests are performed before the test, and then, the results of the study show that the alkalinity test can be cancelled. Background information on the work of the RA52 committee and the decision to remove the alkaline test is published in two articles: Textile Pharmacists and Colorists“Color fastness to perspiration and chemicals”(1974.10) and“Assessing colour fastness to perspiration, laboratory and wearing tests”(1974.11). Although this method has cancelled the alkalinity test, it still requires an alkalinity test in some occasions or some specific uses in foreign trade. Alkaline testing in these applications must be performed 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 perspiration solution. Under the condition of the pressure of the fixture, the temperature can be slowly increased and dried slowly. 4. Apparatus and Materials Sweat testers, sweat meters or related devices (plastic and glass sheets to be fitted with the equipment) (see 12.1). oven—Convective. Multifiber test fabric or FA (see 12.2). Color transmission scale or natural color measurement scale (see 12.3). The natural color scale for testing color change (see 12.3). Dryer (see 12.4). 5. The acidic solution is prepared into one liter with distilled water: 10 grams of sodium chloride, 1 gram of lactic acid, USP85%, 1 gram of Na2HPO4, 0.25 grams of ammonium chloride monohydrate. (see 12.5) The pH 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 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 re-prepared to ensure the accuracy of the weighing of ingredients. 6. Safety precautions: These safety precautions are for information only. Such precautions are subordinate to the testing procedure and do not necessarily have to be included. It is the responsibility of the user to use safe and correct techniques when handling materials with this test method. The manufacturer must consider some special details, such as the Material Safety Data Sheet and other manufacturer recommendations. All OSHA standards and regulations must be Consider and follow. Good laboratory practice must be followed and safety glass should 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 points. Learn more about perspiration color fastness tester: http://www.selaoduyi.com/newslist/list-3-1.html

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