Product Introduction
Acid black MG is a water soluble dye with the appearance of dark brown powder. It dissolves in water. The water solution shows black color.
Mainly used in the dyeing of wool, silk and nylon/polyamide. And can also be used in the dyeing of leather.
pH 4.0-5.0 recommended for the dyeing of wool; pH 4.0-5.0 recommended for the dyeing of nylon/polyamide.
Physical and Chemical Parameters
|
Appearance |
Dark Brown Powder |
|
pH Value (1% Water Solution) |
5.80-7.80 |
|
Strength |
98%-101% |
|
Color Difference CMC (2:1) |
≤0.50 |
|
Moisture |
≤8.00% |
|
Insoluble |
≤0.200% |
|
Solubility (90℃) |
≥60g/l |
|
Degree of Fineness (200um) |
≤8 |
|
Dust-Proof Performance |
≥2 |
Fastness Properties (Polyamide)
|
DYEING DEPTH (O.W.F) |
LIGHT (XENON) |
WASHING (50℃) |
PERSPIRATION (ALKALI) |
RUBBING |
WATER |
|
4% |
1/1 |
CH PA CO |
CH PA CO |
(DRY) (WET) |
CH PA CO |
|
4-5 |
4-5 4 4-5 |
4-5 3-4 4 |
4 4 |
4-5 4-5 4-5 |
FAQ
Q: How are acid dyes classified?
A: Acid dyes could be classified by their dyeing performance and chemical structures. By dyeing performance, acid dyes could be divided into three types: strong acid bath, weak acid bath and neutral bath; By chemical structures, acid dyes could fall into several categories: azo dyes, anthraquinone dyes, triarylmethane dyes, xanthene dyes and so on.
Q: Are acid dyes bad for the environment?
A: Acid dyes are not good for the environment if they are not disposed properly. Acid dyes materials should be stored in a cool, dry and well-ventilated areas and keep them away from strong oxidizing materials. Keep boxes or containers well closed if not used. And do not expose the materials to the air for a long time. Washing the hands after handling. Minimize the dust generation and accumulation in the working areas. More importantly, the dyeing wastes or wasted water should be treated according to the local regulations. Hence if the acid dyes and their dyeing wastes are handled or treated correctly and carefully, they are not bad to the environment.
Q: What are the advantages of acid dye?
A: Acid dyes have smaller market consumption than disperse dyes but acid dyes have much more items with CI. names. Therefore acid dyes have the characteristics of complete chromatography and bright shade. What's more, people can get good dyeing performance with reasonable profits because there are a lot of economical items like acid blue 193, acid black 172, acid black 194 and so on.
Q: Is food coloring an acid dye?
A: Food coloring could be an acid dye. Food coloring are also called food dyes and they are also used for beverages, drugs, cosmetics and so on. They are water soluble with low toxicity or no toxicity.
Q: Where are acid dyes used?
A: Acid dyes are mainly used in the dyeing and printing of fibers such as wool, silk, nylon and modified acrylic fibers. Acid dyes can also be used in the coloring of leather, paper, inks, cosmetics, feather, wood, fur, soaps, food and so on.
Q: Which technique uses acidic dyes?
A: For the purpose of the synthesis of acid dyes, some chemical reactions are carried out, like diazotization, condensation, reduction, coupling and so on.
Q: Are acid dyes water-soluble?
A: Acid dyes are water soluble. Some of them are soluble readily and some of them are soluble slowly. In hot water, most of the acid dyes dissolve very quickly.
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