Process for semipermanent straightening of curly, frizzy or wavy hair

Abstract

The invention relates to a treatment of human hair by means of solutions of Glyoxylic acid that, when used in combination with mechanical straightening by means of hair-straigthening irons set at a temperature of approximately 200° C. +/−30° C., allow for semipermanently changing the shape of hair from curly and/or frizzy to straight for at least six consecutive washings with water and shampoo.

1 . A process for semipermanent straightening of human hair, comprising the following steps:
 a) application of aqueous solution of Glyoxylic acid on hair;   b) permanence of said solution in contact with hair for a time from 30 to 120 minutes;   c) drying of hair with hair-dryer;   d) hair straightening with hair-straightening iron, set at a temperature of approximately 200 +/−30C°.   
     
     
         2 . A process as claimed in  claim 1 , characterized in that said Glyoxylic acid is dissolved in water in concentration comprised between 4.5 and 14.5 percent by weight. 
     
     
         3 . A process as claimed in  claim 1 , characterized in that said aqueous solution containing Glyoxylic acid is added to a mixture of Diacetyl and Acetoin. 
     
     
         4 . A process as claimed in  claim 3 , characterized in that said mixture of Diacetyl and Acetoin is dissolved in said aqueous solution of Glyoxylic acid in concentration comprised between 1 and 5% by weight. 
     
     
         5 . A process as claimed in  claim 1 , characterized in that said aqueous solution of Glyoxylic acid is dissolved in a cosmetic hair formulation. 
     
     
         6 . A process as claimed in  claim 1 , characterized in that said aqueous solution of Glyoxylic acid comprises 90 g of water and 10 g of glyoxylic acid. 
     
     
         7 . A process as claimed in  claim 1 , characterized in that permanence of said aqueous solution of Glyoxylic acid in contact with hair is 60 minutes.