[Effects of perming, combing and stretching on hair keratins]

Research of the hair damage due to perming, combing and stretching can be of important value for forensic hair individual identification.

The normal human hairs were treated with perming combing and stretching, and the keratins of the damage hair were analysed by using SDS-PAGGE and laser densimeter.

Perming, combing and stretching brought about hair damage; The keratins of the damage hair were obviously reduced at the rang of molecular weight of 67,000-43,000 dalton.

The loss of the damage hair keratins were increased with the degree of the hair damage.