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영어

Bleaching does much damage to hair and in turn the damaged hair can't be recovered back again. That's why it is important to do damage as little as possible during the operation. Especially, using moisture can make us check the change of hair damage and thus prevent it a little in advance during the bleaching causing heavy hair damage. Healthy hair, of which the dark brown of four level isn't treated by chemicals within recent half year, cleaned by tepid water after shampooing and then dried in its natural state, is selected as experiment material. Also, the damaged hair is used after one more bleaching. Each sample of healthy hair group and damaged hair group is applied with bleaching agent. Then both groups are divided into the former without moisture and the latter with forty to fifty percent of 2g moisture, and leave it in its natural state by towel dry after shampooing for about half-your. Proceed with this experiment, we observe and film it by SEM(Scanning Electron Microscope) and Field Emission type Scanning Electron Microscope(Scanning Electron Microscope, S-4700/Hitachi). After compared to the cases of bleached hair, the bleaching with forty to fifty percent moisture by towel dry shows less cuticle layer damage than that without moisture. In terms of the level of hair, it is found that meaningful difference doesn't occur between the bleaching with moisture and that without moisture. Therefore, we conclude the bleaching with moisture shows similar brightness but less hair damage compared to that without moisture.