Basic Red 1

Application Features

Colour Fastness Test

Appearance is dark purple red glitter crystal, soluble in water, showing greenish scarlet with fluorescence. It is soluble in alcohol with fluorescent yellow red. It is yellow in concentrated sulfuric acid and turns red after dilution. The concentrated nitric acid is apricot yellow, which is slightly diluted and turns orange. The aqueous solution plus sodium hydroxide has a red precipitate.

Appearance is dark purple red glitter crystal, soluble in water, showing greenish scarlet with fluorescence. It is soluble in alcohol with fluorescent yellow red. It is yellow in concentrated sulfuric acid and turns red after dilution. The concentrated nitric acid is apricot yellow, which is slightly diluted and turns orange. The aqueous solution plus sodium hydroxide has a red precipitate.

Use condition:

1.Silk dyeing:Basic Red 1(Rhodamine 6GDN)  suitable for silk dyeing, carried out in an acetic acid bath. The dyed silk is fluorescent blue-red peach, which is yellower under tungsten light. When dyeing, it is usually made into a slurry with acetic acid and ethanol, then heated water ( 93~96°C) Dissolve, if used for silk graft dyeing, in order not to affect the pH value of the dyebath, it will be dissolved after ethanol alone. It is often dyed on silk products with direct dyeing. 1%, the fastness can reach 2~3.

2. Acrylic dyeing: It can be used for dyeing acrylic fiber, and the dye is dissolved with urea. Add acetic acid, sodium acetate and retarder when dyeing.

3. Wool dyeing: It can be used for wool dyeing, but the light fastness is very poor, only 1~2 grade.

4. Cotton dyeing: It can be used for dyeing and printing of tannin mordant cotton fiber, and the fiber is fluorescent blue-pink pink. However, the light fastness is very poor, the light fastness is 1 level, and the soaping fastness is 2~3.

5. Printing: Rhodamine 6GDN can be used for direct printing of silk fabrics, and the dosage should not exceed 0.05% of the original paste. Generally, it is neutral, acidic and straight. In the multi-color printing of dyes, it is used for embellishing colors. It does not print large and medium-sized patterns, and the dosage is not more than that of printing dextrin. 0.3%. Rhodamine 6GDN can be directly printed in the printing paste by adding the grafting agent during printing, which can also improve the color fastness. It can also be used as the coloring paste of other colors with stannous chloride as the whitening agent. The cotton cloth can be printed directly and the ground color is printed, but the color fastness is very poor.

6. Other: It can be used for dyeing leather and paper.