Hair dye with colour indicator

摘要

Agent for dyeing keratinic fibers, preferably human hair, comprises at least one dyeing composition comprising at least one dye precursor and at least one developer composition comprising at least one oxidizing agent. The developer composition contains at least one pH indicator comprising dimethyl yellow, congo red, bromophenol blue, bromochlorophenol blue, methyl orange, alpha -naphthyl red, bromocresol green, mixed indicator 5, methyl red, ethyl red, brasilin, nitrazin yellow, hematoxylin, phenol red, neutral red, cresol red or water blue. Agent for dyeing keratinic fibers, preferably human hair, comprises at least one dyeing composition comprising at least one dye precursor and at least one developer composition comprising at least one oxidizing agent. The developer composition contains at least one pH indicator comprising dimethyl yellow, congo red, bromophenol blue, bromochlorophenol blue, methyl orange, alpha -naphthyl red, bromocresol green, mixed indicator 5, methyl red, ethyl red, chlorophenol red, carminic acid, alizarin red S, litmus, bromocresol purple, bromophenol red, alizarin, bromothymol blue, bromxylenol blue, brasilin, nitrazin yellow, hematoxylin, phenol red, neutral red, cresol red, m-cresol purple, brilliant Yellow, orange I, alpha -naphtolphthalein, thymol blue, p-xylenol blue, cresolphthalein, phenolphthalein, nile blue A (sulfate), alpha -naphtholbenzein, thymolphthalein or water blue. An independent claim is also included for dyeing and/or brightening of keratin fibers, preferably human hair, comprising: optionally applying a pretreatment agent M1 on the fiber; then, applying an agent M2 on the fiber, where optionally the agent M2 applied prior to application of further agent M3; rinsing the agent M2 after 5-30 minutes from the fiber; and after the treatment, optionally applying a post-treatment agent M4 on the fiber and rinsing after a contact time of several minutes, where at least one of the agent M1, M2 or M3 is the agent.