Abstract:
1. A process for improving the appearance, the feel, the combing and the physical and mechanical properties of human hair which comprises applying to the hair for a period of time between 15 to 60 minutes at a temperature between 15* and 60* C. an aqueous solution of 0.01 to 8 percent by weight of an aldehyde selected from the group consisting of glycolaldehyde, glyceric aldehyde, glutaric aldehyde, terephthalic aldehyde, orthophthalic aldehyde, starch dialdehyde, 2-hydroxymethyl-4-methoxy-3-oxa-pentanedial 4,6-diformyl-2,4,8-trihydroxymethyl-3,5,7-trioxanonanedial and 4,6,8,11-tetraformyl-2,4,13-trihydroxymethyl-3,5,7,10,12-penta oxa tetradecane dial.