Nowadays, hair care and style play a very important role in people�s physical aspect\nand self-perception. Hair cosmetics can be distinguished into two main categories: cosmetics with\ntemporary effect on the hair, for example shampoos, conditioners, sprays, and temporary colors;\nand cosmetics with permanent effect on the hair, such as permanent waves, relaxers, bleaches\nand permanent colors. These cosmetic procedures may induce hair abnormalities. We provide an\noverview on the most important characteristics of these procedures, analyzing components and\neffects on the hair. Finally, we evaluated new camouflage techniques and tattoo scalp.
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