Process for permanent waving of human hair

摘要

Method for perming human hair comprises (1) pretreating the hair with an aqueous alkaline liquid (I) of low viscosity, which contains reducing agent(s) based on an organic thio compound; and, after 5-30 minutes, (2) applying another, more viscous composition (II), which also contains reducing agent(s). The novelty is that (II) has a neutral to weakly acid pH.