Abstract: The fastness of dyeing of fabrics, also called color fastness, refers to the ability of colored fabrics to resist various external effects without discoloration. In recent years, in the international fabric workwear trade, the requirements for dyeing fastness In addition to ensuring the quality of the products, we also pay attention to its safety and environmental protection. The national standard requirements for the fastness of dyeing are water resistance; dry friction resistance and wet friction resistance. The fastness of dyeing required by the EU ecological cloth mark has increased the sun dyeing strength on the basis of the national standard.
The fastness of dyeing of knitted mattress fabric, also called color fastness, refers to the ability of colored fabrics to resist various external effects without changing color. In recent years, in the international fabric workwear trade, the requirements for fastness to dyeing are not only guaranteed. In addition to the quality of the product, it also attaches importance to its safety and environmental protection. The national standard requirements for the fastness of dyeing are water resistance; dry friction resistance and wet friction resistance. The fastness of dyeing required by the EU ecological cloth mark has increased the fastness of sunlight dyeing and the fastness of sweat staining in addition to the national standard.
Detection process of dyeing fastness:
Washing and dyeing fastness: The sample and the standard woven pp fabric are stitched together, washed, washed and dried, and washed under the appropriate temperature, alkalinity, bleaching and friction conditions, so that the test can be obtained in a short time. result. The friction between them was accomplished by the small bath ratio and the rolling and impact of the appropriate number of stainless steel beads. The gray card was used to rank the test results. Different test methods have different temperature, alkalinity, bleaching and friction conditions, and sample size. The specifics should be selected according to test standards and customer requirements. Generally, the colors with poor fastness in washing and dyeing are Cuilan, Yanlan, black and red, and navy blue.
Fastness to dry cleaning dyeing: Same as fastness to washing dyeing, except that washing is changed to dry cleaning.
Rubbing fastness: Put the sample on the rubbing fastness tester and rub it with a standard rubbing white cloth under a certain pressure for a certain number of times. Each group of samples needs to be tested for dry rubbing fastness and wet rubbing fastness. Fastness. The color on the standard rubbing white cloth was graded with a gray card, and the resulting grade was the measured fastness to rubbing dyeing. The fastness of rubbing dyeing requires two tests, dry rubbing and wet rubbing, and all the colors on the specimen must be rubbed.
Fastness to sunlight dyeing: When fabrics are used, they are usually exposed to the finish line, which can destroy the dye and cause the well-known "fading", which causes the colored fabrics to change color, generally lighter, darker, and some will appear The color finish changes, so you need to test the fastness of dyeing. The fastness test of sun dyeing is to put the sample and blue wool standard cloth with different fastness grades together under the specified conditions for day-end exposure. , Compare the sample with the blue wool cloth to evaluate the fastness to finish dyeing. The higher the grade of the blue wool standard cloth, the more durable it is.
Fastness to perspiration staining: Sew the sample and the standard lining fabric together, put them in the perspiration solution, sandwich them on a perspiration resistance tester, put them in a constant temperature in an oven, and then dry them with a gray card. Rating to get test results. Different test methods have different sweat stain ratios, different sample sizes, and different test temperatures and times.
The fastness of dyeing of knitted mattress fabric, also called color fastness, refers to the ability of colored fabrics to resist various external effects without changing color. In recent years, in the international fabric workwear trade, the requirements for fastness to dyeing are not only guaranteed. In addition to the quality of the product, it also attaches importance to its safety and environmental protection. The national standard requirements for the fastness of dyeing are water resistance; dry friction resistance and wet friction resistance. The fastness of dyeing required by the EU ecological cloth mark has increased the fastness of sunlight dyeing and the fastness of sweat staining in addition to the national standard.
Detection process of dyeing fastness:
Washing and dyeing fastness: The sample and the standard woven pp fabric are stitched together, washed, washed and dried, and washed under the appropriate temperature, alkalinity, bleaching and friction conditions, so that the test can be obtained in a short time. result. The friction between them was accomplished by the small bath ratio and the rolling and impact of the appropriate number of stainless steel beads. The gray card was used to rank the test results. Different test methods have different temperature, alkalinity, bleaching and friction conditions, and sample size. The specifics should be selected according to test standards and customer requirements. Generally, the colors with poor fastness in washing and dyeing are Cuilan, Yanlan, black and red, and navy blue.
Fastness to dry cleaning dyeing: Same as fastness to washing dyeing, except that washing is changed to dry cleaning.
Rubbing fastness: Put the sample on the rubbing fastness tester and rub it with a standard rubbing white cloth under a certain pressure for a certain number of times. Each group of samples needs to be tested for dry rubbing fastness and wet rubbing fastness. Fastness. The color on the standard rubbing white cloth was graded with a gray card, and the resulting grade was the measured fastness to rubbing dyeing. The fastness of rubbing dyeing requires two tests, dry rubbing and wet rubbing, and all the colors on the specimen must be rubbed.
Fastness to sunlight dyeing: When fabrics are used, they are usually exposed to the finish line, which can destroy the dye and cause the well-known "fading", which causes the colored fabrics to change color, generally lighter, darker, and some will appear The color finish changes, so you need to test the fastness of dyeing. The fastness test of sun dyeing is to put the sample and blue wool standard cloth with different fastness grades together under the specified conditions for day-end exposure. , Compare the sample with the blue wool cloth to evaluate the fastness to finish dyeing. The higher the grade of the blue wool standard cloth, the more durable it is.
Fastness to perspiration staining: Sew the sample and the standard lining fabric together, put them in the perspiration solution, sandwich them on a perspiration resistance tester, put them in a constant temperature in an oven, and then dry them with a gray card. Rating to get test results. Different test methods have different sweat stain ratios, different sample sizes, and different test temperatures and times.
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