Basic Brown 1

Brown 1 is brown in concentrated sulfuric acid and becomes red red after dilution. In concentrated nitric acid, orange solution turns yellow. Dye solution in aqueous solution with hydrochloric acid has no change, and 10% sodium hydroxide has orange precipitation. Cotton dyed with tannin mordant is brown, slightly red under tungsten filament light.

Colour Fastness Test

1. Silk dyeing: it is carried out in acid bath, which is rarely used at present.

2. Acrylic fiber dyeing: the fastness of acrylic fiber dyeing is grade 1~2, grade 4~5, soaping, ironing and dry cleaning.

The fastness is grade 4, dry and wet rubbing fastness is grade 3~4, water immersion fastness is grade 4~5.

3. Wool dyeing: poor fastness to dyeing on wool, grade 1~2 fastness to sunlight, grade 1~2 fastness to soaping.

4. Cotton dyeing: it can be used for the dyeing of tannic mordant cotton fiber. The fastness to sun is grade 1, the fastness to soaping is grade 3~4, the fastness to staining is grade 3, the fastness to water immersion is grade 4, the fastness to staining is grade 3, the fastness to sweat stain is grade 3~4, the fastness to staining is grade 2~3, and the fastness to ironing is grade 3 grade 4, dry and wet rubbing fastness of grade 3 to 4, acid fastness of grade 2 to 3, acetic acid fastness of grade 4 to 5, alkali fastness of grade 1.

5. Others: can be used for leather, paper, bamboo dyeing, as well as the manufacture of lake and solvent dyes.

Precaution:

Basic Brown 1 is mild Allergic dye.

Used for wool, silk, leather, paper, bamboo, wood color, also used in the manufacture of color and solvent dye deposit.