The so-called color fastness refers to the degree to which the color of dyed textiles remains firm under physical and chemical effects, that is, the degree of fastness of the color of dyed textiles to external influences is called dye fastness. According to the color change of the sample after the experiment, the identification grade of the stain degree of the white cloth indicates the quality of the color fastness.

Color fastness is the most important goal of the quality of the buttonhole webbing. The primary focus is the color fastness resistance to conflict, perspiration, washing, light, and washing.
All kinds of delicate webbing that are usually seen go through multiple elastic belt processes during the production process. During this process, due to errors caused by various reasons such as raw materials, production processes, and operations, the webbing is usually in different batches. Even the same batch of fabrics will be different in color. The size of the color difference of the fabric, if the color light source is different, the color environment, the color time are different, and the evaluation of the color difference is also different. Therefore, in order to accurately evaluate the difference between colors and ensure the consistency of the color matching results, when visually identifying colors, the light source specified by the customer must be selected in the standard color matching light box to prevent visual effects caused by irregular light sources or different light sources. difference.
The problem of discolored webbing produced by the buttonhole webbing factory can be big or small. If the webbing used for clothing accessories is discolored during washing, it will contaminate the whole clothes or the clothes that are washed at the same time.