abstract |
The invention relates to a cosmetic composition for the first stage of a permanent hair deformation operation containing, as reducing agent, an N-mercaptoalkyl alkanediamide or one of its cosmetically acceptable salts, and its use in a deformation process. permanent hair. It also relates to new N-mercaptoalkyl alkanediamide disulfides as well as new N-mercaptoalkyl alkanediamides. |