Plant hair dye and method for dyeing hair by the plant hair dye

Abstract

The invention discloses a plant hair dye and a method for dyeing hair by the plant hair dye. The plant hair dye contains 1, a composition containing a water-soluble ferric salt and an excipient, wherein the weight percentage of the water-soluble ferric salt is in a range of 1 to 10%, and 2, a composition containing tannic acid or hematorylin and an excipient, wherein the weight percentage of tannic acid or hematorylin is in a range of 1 to 10%. The method for dyeing hair by the plant hair dye comprises the following steps of smearing the composition containing the water-soluble ferric salt and the excipient on semi-wet or dry hair, washing off the composition containing the water-soluble ferric salt and the excipient, smearing the composition containing tannic acid or hematorylin and the excipient on the hair, and washing off the composition containing tannic acid or hematorylin and the excipient. The plant hair dye also contains a composition containing an excipient, and D,L-cysteine and / or its salt, or a cysteine derivative, or thioglycolic acid and / or its salt or ester. The plant hair dye has the advantages of no irritation, no allergenicity, no mutagenicity, no stink, no smell, no damage on hair, excellent dyeability and color tone, and long color retention time after dyeing.

Description

technical field [0001] The invention relates to a plant-based hair dye and a hair dyeing method using the same. Background technique [0002] The first part of the oxidative chemical hair dyes currently on the market is mainly composed of oxidative dyes, coupling agents and alkali agents, and the second part uses high-concentration hydrogen peroxide as the main component. The hair dyeing principle of oxidative chemical hair dye is to open the hair cuticles with the first dose of alkaline agent, so that the oxidation dye and coupler can enter the cortex of the hair smoothly, and then use the second dose containing hydrogen peroxide to dissolve the hair that has entered the cortex of the hair. Oxidation dyes and coupling agents are oxidized, and then the polymer dyes formed after oxidation are directly deposited on the hair cortex, so as to achieve the purpose of permanent hair dyeing. However, many latest research reports have pointed out that most of the oxidation dyes and ...

AI Technical Summary

Problems solved by technology

[0036] 3. The formula disclosed in Taiwan Patent Certificate No. 040224 is an aqueous solution formulation. This formulation does not contain oil at all. It will only cause severe knotting and dryness after dyeing the hair. It cannot achieve shiny, glossy and soft hair. Achieve the commodity performance of hair dye

[0037] 4. The acquisition of geranoid tannin is inconvenient and the product cost is too high, so it is difficult to reduce the cost to meet market demand and market competitiveness

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