After all, a color is monotonous. In addition to dyeing, people also use printing techniques to make silk colorful. Printing refers to a process in which dyes are printed on fabrics in accordance with the designed colors. Commonly used printing processes include direct printing, discharge printing, and anti-dyeing. Direct printing means that the color paste is directly printed on the silk fabric through the screen printing plate. It is one of the basic printing methods and can be printed with a variety of dyes. Discharge printing, also called engraving printing, is a process of discharging with whitening agent. Before printing and dyeing, the silk is dyed with acid dyes and reactive dyes with azo structure, and then printed on the colored silk according to the pattern. The engraving (discharge) paste made from the engraving agent that destroys the pigment, after steaming, the ground color of the engraving paste becomes white, which is called "carving white". [8]
Anti-dye printing is to print silk fabrics with "anti-white" paste or "color-resistant" paste according to patterns, and then dye them after they are dried. Because the pattern part has the anti-dyeing agent in the "anti-white" paste or the "color-proof" paste, it will not be dyed, while the rest are all colored.
