The difference between printing and dyeing lies in the following aspects.
1. In the printing and dyeing operations, the dyeing process uses the dye aqueous solution, generally no thickening paste or only less paste is added; while the printing uses the color paste, the color paste is in the dye solution or dispersion Add more thickening paste into the liquid to prepare a paste with a certain viscosity to prevent the contour of the shape from being unclear due to the infiltration of the Chinese language during printing. The shape is true and the dye is dried after printing. Swimming.
2. The dye concentration is generally not used during dyeing, and the problem of dye dissolution is not too big. Usually, no co-solvent is added. The dye in the color paste during printing. The concentration of the chemical footprint is much higher than the expected concentration. The value contains a large amount of paste, which makes it difficult to dissolve the dye. Therefore, the Chinese medicine in the printing paste is added with a co-solvent such as urea, and it dissolves salt b.
3. When dyeing, the fabric has a longer action time in the desire, so that the dye can be fully diffused. Penetrate into the fiber to complete the dyeing process. When printing, the dye is not easy to diffuse and penetrate in the paste, so after printing, post-processing methods such as steaming or baking are required to increase the diffusion rate of the dye and help the dye dye the fiber.
