Black dye composition for hair and dyeing method thereof

Abstract

The invention relates to a dye composition which comprises deksol black B, deksol orange PS and deksol yellow PS. Dyeing is carried out on protein fiber materials such as hair, wool and the like, according to a preferable dye process by adopting the dye of the invention, high dyeing rate, good level-dyeing property, bright chromatic light can be ensured, with pH adjusted by adding sulphuric acid, acetic acid and methanoic acid to a compound to be dyed, fastness properties are excellent, moreover, the dye meets environmental requirements.

Description

technical field [0001] The invention relates to an improved black dye composition suitable for dyeing protein fiber materials such as hair and wool, in particular to a black dye composition for dyeing protein fiber materials such as hair and wool and a dyeing method thereof. Background technique [0002] The dyeing of hair and related products is generally carried out by acid dyes, metal complex dyes or mordant dyes. [0003] Although acid dyes have a complete spectrum, bright colors and simple dyeing process, the wet fastness of dyeing is very poor because acid dye molecules and protein materials such as hair and wool are mainly bound by ionic bonds to cause dyeing. In addition to ionic bonds between metal complex dye molecules and protein materials such as hair and wool, there may also be hydrogen bonds, van der Waals forces, and coordination bonds. Therefore, the wet fastness of dyeing has improved, but due to the molecular weight of the dye Large, so the solubility and ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved in the present invention is to overcome the problems of poor wet fastness after dyeing protein materials such as hair and wool by traditional acid dyes, metal complex dyes and mordant dyes or heavy metals are contained in the dye structure or heavy metals are added in the dyeing process.