The Effects of Components in Bleaching Agents on Hair Bleaching

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  • MAEKAWA Masako
    Faculty of Human Life and Environment, Nara Women's University
  • YANG Sunmi
    Graduate School of Human Culture, Nara Women's University

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  • ブリーチ剤を用いた毛髪の脱色における配合成分の効果
  • ブリーチザイ オ モチイタ モウハツ ノ ダッショク ニ オケル ハイゴウ セイブン ノ コウカ

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Bleaching of human hair with three types of commercial bleaching agents was studied. The bleaching effects on human hair differed depending on which component, an oxidizing agent, an alkali, or sodium percarbonate, was used. The effects of pH on color difference, tensile strength and surface morphology of the hair were then studied by adding sodium hydroxide into the hydrogen peroxide aqueous solution. It was revealed that bleaching effects increased when the pH level was more than 9; however, the tensile strength decreased and the surface morphology deteriorated with increasing pH levels. Furthermore, it was suggested that bleaching with sodium percarbonate caused greater color differences and less damage than hydrogen peroxide bleaching with alkali.

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