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과산화수소(H2O2) 농도와 탈색시간이 모발의 손상에 미치는 영향
김청운 ( Chung Wun Kim ),양진희 ( Jin Hee Yang ),김애순 ( Ae Soon Kim ) 한국미용학회 2007 한국미용학회지 Vol.13 No.2
A bleaching agent which is extensively used to decorate appearance affects deeply the health of a hair. The aim of this study is to investigate a damage of a bleaching agent on a healthy hair. In order to evaluate an influence of a bleaching agent the healthy hair was treated with various concentrations of a bleaching agent and several handling times, and then the morphological and physical changes of the hair was investigated by SEM (scanning electron microscope) and UTM (universal testing maching). The tensile strength of virgin hair treated with a bleaching agent depended on the concentration of hydrogen peroxide and the handling times. When the concentration of hydrogen peroxide and the handling times was increased, the tensile strength of the hair was increased and on the other hand, the tensile strain was decreased. After the bleaching process, also, the color difference of the hair significantly showed up. The virgin hair observed by SEM was covered with the healthy cuticle which forms the outer surface of the hair. But, the bleached hair was swelled and the cuticles of the hair were down intermediately. The swelling of the hair and the breaks of the cuticles was dependently increased by the concentration of hydrogen peroxide and the handling times. When the bleaching of the hairs was achieved with various treatment times and concentrations of the bleaching agents, the damages of the hairs were occurred to the minimum at 3% of the bleaching agent for 10min treatment time. In the treatments to enhance the value of brightness of hairs, the damages of the hairs were minimized when they were treated with 9% of the bleaching agent for 10 min of treatment time. Consequently, the bleaching treatment impairs the healthy hair in abundance. Therefore, the prudence in the use of the bleaching agents should be asked for the beauty and health of the hair.
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