PROCESS FOR STRAIGHTENING THE HAIR

摘要

The present invention provides methods for simultaneously colouring and straightening the hair, for straightening the hair directly before or after a colouring treatment, and for straightening the hair directly before or after a bleaching treatment. Besides, the present invention also provides a method for straightening the hair by drying the hair with hot air under conditions of mechanical tension. The straightening methods of the present invention utilize compositions containing formaldehyde.

主权项

1. A process for treating hair, characterized in that it comprises the following steps performed in this order:
(a) application of a dyeing/straightening composition comprising at least one direct dye and formaldehyde onto the hair; (b) leaving the composition on the hair for 1 to 120 minutes; (c) optionally rinsing off the hair; (d) drying the hair; and (e) treating the hair with an iron having a surface temperature of 180±50° C. (f) optionally rinsing off and/or shampooing the hair and drying.