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Cosmetics 2015, 2(2), 110-126; doi:10.3390/cosmetics2020110

Types of Hair Dye and Their Mechanisms of Action

School of Pharmaceutical Sciences, University of São Paulo, 05508-000 São Paulo, Brazil
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Academic Editor: Enzo Berardesca
Received: 18 February 2015 / Revised: 31 March 2015 / Accepted: 2 April 2015 / Published: 22 April 2015
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Abstract

Hair color change by dye application is a common procedure among women. Hair dyes are classified, according to color resistance, into temporary, semipermanent, demipermanent and permanent. The first two are based on molecules which are already colored. Temporary dyes act through dye deposition on cuticles, but semipermanent may penetrate a little into the cortex and so the color resists up to six washes. Demipermanent and permanent dyes are based on color precursors, called oxidation dyes, and the final shade is developed by their interactions with an oxidizing agent, but they differ from the alkalizing agent used. In oxidation systems, there is an intense diffusion of the molecules into the cortex, what promotes a longer color resistance. Dyes and color precursors present differences related to chromophore groups, hair fiber affinity, water solubility, and photo stability. The aim of this review is to discuss the differences among hair dye products available in the market and their action mechanisms, molecular structures, application methods, and some aspects of formulations. View Full-Text
Keywords: hair; dye; temporary; semipermanent; permanent; action mechanism hair; dye; temporary; semipermanent; permanent; action mechanism
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

da França, S.A.; Dario, M.F.; Esteves, V.B.; Baby, A.R.; Velasco, M.V.R. Types of Hair Dye and Their Mechanisms of Action. Cosmetics 2015, 2, 110-126.

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