The use of caustic soda in printing and dyeing

- Mar 29, 2018-

1. The use of caustic soda in printing and dyeing: It is mainly used for lanthanide dyes and lanthanide dyes. In the vat dyeing process, the caustic soda solution and the infusible powder are used to reduce it to leuco acid, which is then oxidized to the original insoluble state by the oxidizing agent. After the cotton fabric is treated with the caustic soda solution, the wax, grease, starch and the like covering the cotton fabric can be removed, and the mercerized color of the fabric can be increased to make the dyeing more uniform.

2. Alkaline-like white translucent flake solid, caustic soda is a basic chemical raw material, widely used in papermaking, synthetic washing and soap, viscose fiber, rayon and cotton textiles and other light textile industries, pesticides, dyes, rubber And the chemical industry, oil drilling, oil refining oil refining and tar refining of the oil industry, as well as the defense industry, machinery industry, wood processing, metallurgical industry, pharmaceutical industry and urban construction. It is also used in the manufacture of chemicals, paper, soaps and detergents, rayon and cellophane, processed alumina made from bauxite, as well as mercerizing of textiles, water treatment, etc.