Acid Blue 90

Application Features

Dark brown powder, slightly soluble in water, soluble in hot water (bright blue) and ethanol (bright blue). When a blood-red of sulfuric acid, a orange red after diluted. Its water solution and sodium hydroxide for purple.

Appearance is dark brown powder. Slightly soluble in cold water, soluble in hot water, bright blue, soluble in ethanol, brilliant blue. In case of concentrated sulfuric acid, it is blood red, diluted to orange-red; aqueous solution is brilliant blue, hydrogenated Sodium oxide is purple.

Used for wool and silk dyeing, also can be used for leather dyeing.

Use condition:

1. It is used for dyeing and printing wool, silk and nylon, and can also be used for dyeing leather.

2. Wool dyeing: It is carried out in a weakly acidic bath. The pH of the dyeing solution is adjusted to 4~6, which can be dyed at 50~60°C. The highest dyeing temperature during the heating process is 85~95°C.

3. Silk dyeing: It is carried out in a weakly acidic bath, and the color is bright, but the dyeing fastness is poor. When it is dyed in the dark color, although it is still fixed by the fixing treatment, it can be fixed with synthetic tannin and dried. After drying, fix it with a cationic fixing agent.

4. Nylon dyeing: It is carried out in a weakly acidic bath and fixed by a synthetic tannin fixing agent to improve its wet handling fastness.

5. Blending of blended fabrics: When wool and various fibers are dyed in the same bath, the apparent color depth of silk and nylon is close to that of wool, polyester and acrylic are stained, and cellulose fibers are not stained.

6. The sun fastness is poor, and it is not suitable for dyeing textiles for outerwear.

7. It is widely used in silk dyeing and printing, and can be used as a color dye for stannous chloride discharge printing; after dyeing the ground, it can be whitened with decolin or white powder.