Textile finishing, namely "dyeing and finishing". Chemical methods are mainly used to process fiber materials and their products to make printing and dyeing products. It mainly includes four processes: scouring and bleaching, dyeing, printing and finishing. They are used to remove impurities and pigments in textile fiber materials; dye evenly and have a certain color fastness; print patterns with a certain dye fastness according to the design requirements of the pattern; improve the appearance, feel, and dimensional stability of the fabric, Enhance or endow fabrics with certain functions and improve the wearability of fabrics.