Study of Evaluation Methods of Permanent Waves with Some Kinds of Hair Materials

Abstract

Permanent waves of natural hair and a few kinds of artificial hair were evaluated with various methods. Some artificial hair without S-S bonds chemically showed good wave values just after perm treatment by molecular crosslinking with hydrogen bonds. But their wave characters with durability were quite different from those of natural hair.
We propose a new evaluation method of indicating wave durability quantitatively. And an artificial hair made of Poly (amino acid) with SH groups and amino groups showed similar wave property to natural hair by our new evaluation method.