Color fastness to washing AATCC TM61 test analysis

AATCC TM61 Accelerated Washing Test Method for Color Fastness to Washing, for evaluating the color fastness to washing of textiles after frequent washing, fading and surface changes caused by the action of detergent solutions and rubbing action of fabrics after five classic hand washes or home washes , which is close to a 45-minute test. The color fastness tester to washing is a test instrument, which can be provided by (Hong Kong) Co., Ltd., and customers in need are welcome to inquire in time. However, the level of contamination from five classic hand or home washes cannot be predicted by the 45-minute test. Because the fabric fiber composition in the wash load, the ratio of color to the backing fabric and other end-use conditions, etc., are different. Test principle: The sample is tested under suitable temperature, washing liquid, bleaching and friction, and the color change of the sample can be obtained in a short time. This frictional effect is the result of the impact of the sample against the container, the low liquor ratio solution and the steel ball. Test steps: A. Table 1 is a summary of the test conditions: Table 1. Test conditions B. Adjust the temperature of the water bath in the color fastness tester to the specified requirements, configure the washing liquid according to the requirements of Table 1, and preheat the solution to the specified temperature . C. Test 1A with 75×125mm (3×5inch) stainless steel cup, 2A, 3A, 4A and 5A, use 90×200mm (3.5×8.0 inch) stainless steel cup: 1. Add the specified amount of detergent (see Table 1) to the test container of 1B, 1A, 2A or 3A 2. For the 4A test, first prepare a 1500ppm available chlorine solution. The amount of sodium hypochlorite added (g) = 159.4/concentration of sodium hypochlorite, and the amount of sodium hypochlorite added above is dissolved in water to prepare a 1L solution. 45 ml of the designated detergent solution and 5 ml of the 1500 ppm available chlorine solution were added to the test container. 3. For the 5A test, the amount of sodium hypochlorite added (g) = 4.54/concentration of sodium hypochlorite. Add the amount of sodium hypochlorite and the specified detergent solution to a graduated cylinder to make a 150ml solution. Prepare this solution separately into each steel cup. 4. Put the specified number of stainless steel beads or white rubber balls in each test cylinder. D. There are two options for preheating stainless steel to the test temperature: through soaping machine or preheating/storage equipment, if using soaping machine for preheating process, see 2. 1. Clamp the cylinder cover and put it into the instrument, and run the instrument for at least 2 minutes to preheat the test cylinder. 2. Fasten the lid of the steel cup, and add a TEFLON seal between the top of the stainless steel cup lid and the rubber seal to prevent the seal from contaminating the soaping liquid. will 75×125mm (3×5inch) steel cups are locked vertically and the 90×200mm (3.5×8.0 inch) steel cup is locked horizontally on the shaft of the soaping machine. This is done so that the lid hits the water first. Place the same number of steel cups on both sides of the stand. See 7 for preheating stainless steel cups in assemblies. E. Start rolling the rollers and warm up, at least two minutes. F. Stop the machine, open the lid of the test cylinder, put in the sample, cover the lid, but do not clamp it, repeat the process for other cylinders in the same row, and clamp the lid in the original order (this is to take into account the pressure balance). Repeat the above process for the other rows of cylinders. G. Turn on the machine to 40±Run at 2rpm for 45min. H. Rinse, dehydration and drying procedures are the same for each test. Stop the machine, remove the container, put the sample into the beaker, use 40±The samples were rinsed with water at 3°C ​​for 1 minute and repeated three times. It should be stirred occasionally or squeezed by hand. Excess water can be removed with a centrifuge or roller press. Dry the sample in an oven with a temperature not exceeding 71°C (160°F), or place the sample in a nylon bag and then put it in an automatic spin dryer, usually the outlet temperature of the dryer is 60-71°C Or air dry. I. Put the sample at a relative humidity of 65 before rating±2% and a temperature of 21±Conditioned at 1°C for 1 hour. J. Before evaluation, cut the stitches of the sample and smooth the fabric. Grab the wool fabric, and wipe the side with fine hairs. The Y-stimulus value is at least 85%, and the binding material must not interfere with the rating according to AATCC Procedures 1 and 2 or Device Evaluation Procedure 7. If the sample is yarn, it shall be combed or smoothed before comparison with unwashed yarn before comparison.

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