Color fastness is known as color fastness and dyeing fastness. It refers to the resistance of textile colors to various functions in processing and using processes. The fastness rating is evaluated according to the color change of the sample and the stain of the fabric. Textile color fastness test is a routine testing item in the internal quality test of textiles.
The color fastness is directly related to the health and safety of the human body. In the process of wearing the poor quality color fastness clothes, the pigments on the fabric will fall off and fade in, and the molecules and heavy metal ions of the dye are likely to be absorbed by the human body and threaten the health of the human skin. On the other hand, It will affect other clothes that are worn on it, or stain other clothes when washing.