Color fastness to rubbing of textile fabrics
Textile fabrics rub resistance color fastness protective fabrics
Comparison of test methods for color fastness to rubbing
The color fastness to rubbing test refers to a test in which a colored sample is rubbed with a dry rubbing cloth and a wet rubbing cloth respectively, and then the staining degree of the rubbing cloth is evaluated. The test results are divided into 5 levels, with level 5 being better and level 1 being worse. Although the test process is simple, it is a basic color fastness assessment indicator for textile products. It is almost one of the items that buyers from all over the world must assess when placing orders. The technical conditions of rubbing fastness testing standards in various countries are very similar, but there are also some differences.
Main factors affecting color fastness to rubbing and their control measures
During the process of friction between textiles and other objects, the color shedding or staining of the rubbed objects is affected by many factors. There are two ways of color shedding and staining: one is that the dye on the textile falls off or fades and is stained on the surface of the friction object; the other is that the dyed fibers fall off and adhere to the surface of the friction object.
Dye shedding is the main cause of staining
Although there are certain differences in the covalent bond strength and adhesion between reactive dyes with different chemical structures and cellulose fibers, their effects on the wet rubbing fastness of dyed fabrics are basically the same. When dyed fabrics are wet rubbed, the covalent bonds formed between the dye and the fiber will not break and cause floating color. The transferred dye usually does not form a covalent bond with the fiber, but only relies on van der Waals forces to produce adsorption, that is, floating color.
The wet rubbing color fastness of the protective fabrics produced by the city textile can reach level 3-4, and the dry rubbing color fastness can reach level 4-5, which is completely Comply with international standard requirements.
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