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5. Different types of hair color and associated dyes
Hair colorants can be divided into two categories: oxidizing and non-oxidizing. Oxidizing colorants significantly increase the duration of color. Depending on the durability of the color after application, there are three families of colorants: temporary, semi-permanent and permanent. The principle behind temporary and semi-permanent colorations is based on the use of coloring molecules with a strong affinity for keratin, which adsorb to the hair surface: these are direct colorants. They interact only with the cuticles and penetrate little or not at all into the hair. The duration of coloring depends mainly on the molar mass of the coloring molecule. Permanent colorations (sometimes also called semi-permanent colorations), on the other hand, are reactive, involving an oxidizing agent and oxidation dyes. Permanent colorations are the most common, accounting for 66% of all colorations, versus...
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Different types of hair color and associated dyes
Examples of color formulas
Bibliography
Websites
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Perfumes and Cosmetics Congress – Regulatory issues, takes place every year in Chartres.
http://www.congres-parfumscosmetiques.com/fr/
Cosmetagora tradeshow, held every year in Paris
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Regulations
Regulation (EC) No 1223/2009 of the European Parliament and of the Council of November 30, 2009 on cosmetic products, OJ L 342, 22.12.2009, p. 59-209.
Regulation (EC) No 1272/2008 of the European Parliament and of the Council of December 16, 2008 on classification, labeling and packaging of substances and mixtures, amending and repealing Directives 67/548/EEC and 1999/45/EC, and amending Regulation...
Patents
KNUEBEL (G.), KONARD (G.), MICHEL (R.). – Process for the production of 5,6-dihydroxyindolines. US5399713A (1995).
HOEFFKES (H.), SCHUMANN (K.), NEUHAUS (W.). – Colorants. US6818023, US6537330 (2003 and 2004).
SÜNGER (G.), KOLONKO (C.). – Oxidationsfärbemittel zur Färbung keratinhaltiger Fasern mit Luftsauerstoff als einzigem Oxidationsmittel. DE102007056934A1 (2007)....
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Cosmetic Valley, the world's leading perfumery and cosmetics network
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FEBEA, trade association for the cosmetics industry
Cosmed, an association created on the initiative...
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