Agent for dyeing and/or bleaching keratin fibers in two parts
A keratin fiber and reagent technology, which is applied to cosmetic preparations, medical preparations containing active ingredients, cosmetics, etc., can solve problems such as inappropriateness, hinder application to fibers, inaccurate application, etc. effect of potency
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Embodiment approach
[0053] According to a preferred embodiment of the invention, composition (A) does not contain any ammonia.
[0054] According to a preferred embodiment of the invention, when the composition (A) contains ammonia or its salt, it also contains one or more alkanolamines, and one or more alkanolamines in the composition ( The weight in A) is greater than the weight of ammonia in the same composition.
[0055] Generally, the content of one or more alkalizing agents of the composition (A) ranges from 0.1% to 40% by weight, preferably from 0.5% to 20% by weight, relative to the weight of the composition.
[0056] Preferably, composition (A) has a pH greater than or equal to 8 and more preferably a pH in the range of 8.5 to 11.5.
[0057] The pH can also be adjusted to the desired value by using one or more acidifying agents in addition to the alkalizing agent.
[0058] Among the acidifying agents, examples that may be mentioned include inorganic or organic acids, such as hydrochlor...
no. 1 approach
[0214] According to a first embodiment of the invention, composition (A) also comprises one or more oxidation dyes.
[0215] In this case, the agents according to the invention are advantageously used for the oxidative dyeing of keratin fibers.
[0216] In this embodiment, composition (A) may also comprise one or more direct dyes.
no. 2 approach
[0217] According to a second embodiment of the invention, composition (A) also comprises one or more direct dyes.
[0218] In this case, and when the composition (A) does not comprise any oxidation dyes, the agents according to the invention are advantageously used for the bright direct dyeing of keratin fibers.
[0219] Oxidation dyes which may be used in the present invention are generally selected from oxidation bases, optionally in combination with one or more couplers.
[0220] The oxidation bases may be chosen in particular from p-phenylenediamines, bis(phenyl)alkylenediamines, p-aminophenols, ortho-aminophenols, and heterocyclic bases and their addition salts.
[0221] Among the p-phenylenediamines that may be mentioned are for example p-phenylenediamine, p-toluenediamine, 2-chloro-p-phenylenediamine, 2,3-dimethyl-p-phenylenediamine, 2,6- Dimethyl-p-phenylenediamine, 2,6-diethyl-p-phenylenediamine, 2,5-dimethyl-p-phenylenediamine, N,N-dimethyl-p-phenylenediamine, N, N-d...
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