The Most Popular Direct Sky Blue 5B For Dyeing Paper

The main features of Direct Sky Blue 5B include:
A.Blue powder, soluble in water, red blue solution, high dyeing, easy to operate, high direct to cellulose, do not need to use chemical coloring, insoluble in organic solvents.
B.When dyes dye cellulose fibers, salt acts as an accelerant. The dyeing promotion mechanism is that the direct dye is dissociated into pigment anion in the solution to dye the cellulose fiber, the cellulose fiber is also negatively charged in the water, there is a charge repulsion between the dye and the fiber, adding salt in the dyeing solution, can reduce the charge repulsion, improve the dyeing rate and dyeing percentage. The effect of different direct dye salts is different. The salt effect of direct dyes containing more sulfonic acid groups in the molecules is significant, so the salt should be added in batches to ensure that the dye is evenly dyed. Direct dyes with low percentage of dye need more salt, and the specific amount can be determined according to the dye variety and dyeing depth. The amount of salt should be appropriately reduced for light-colored products with high evenness, so as to avoid local unevenness and color defects.
C. It is mainly used for dyeing cellulose fibers such as cotton and viscose. It can also be used for dyeing paper and biology as well as coloring movie film. It can also be used for making ink. Direct Sky Blue 5B is one of the main blue dyes used at present, and it is used for dyeing and printing in viscose fabric. In addition to use alone, often with direct green B, dark green B, jujube GB, dark brown M and copper blue 2R direct dye color combination.