Color fastness is one of the important quality indicators of textile webbing. The so-called color fastness refers to the degree to which the color of the dyed cotton-like webbing remains firm under physical and chemical action, that is, the degree to which the color of dyed textiles is affected by external influences is called color fastness. According to the color change of the sample after the test, the evaluation grade of the staining degree of the white cloth indicates the quality of the color fastness.

Among the various items of color fastness, the most commonly used color fastness at present are color fastness to rubbing, color fastness to perspiration, color fastness to washing, color fastness to light, color fastness to water immersion, color fastness to brushing Items such as color fastness, weather resistance, etc. In actual life, which items to be assessed are mainly determined according to the final use of the product. The color fastness to perspiration, dry rubbing, and water immersion are the items required by the basic safety technical specifications for cotton-like webbing. All dyed cotton-like webbing should be tested and assessment.