| abstract |
The present invention relates to an agent for the permanent shaping of human hair, which contains thioglycolic acid or its salts, preferably the ammonium salt, and consists of two compositions which are kept separate from one another until use, the one composition (A) being an amino acid hydrochloride and at least one Contains polyol or its methyl and ethyl ether, in particular 1,2-propanediol, in aqueous solution and preferably has a pH between about 4.5 and 6.5, and the second composition (B), kept separately, ammonium hydrogen carbonate, Contains ammonium carbonate and / or ammonium carbamate as an alkalizing agent, the pH being between about 8 and 9.5, and both compositions being mixed with one another immediately before use, a pH between about 7 and 8 being set. The compositions, which are kept separate from one another, have excellent stability; when used after mixing, an optimal wave effect is achieved with a gentle effect on the hair. |