Metallic Dye

From Wikipedia, the free encyclopedia

Metallic, or progressive, dyes use metallic salts to gradually color the hair through reactions with the sulfur in the keratinized proteins that make up the hair and through oxidation on the surface of the hair. Many people like these products because of their gradual progression^{[citation needed]}, which allows for a subtle change over time in the hair color, and the natural-looking results. However, these dyes leave metallic deposits in the hair which can then cause undesired chemical reactions when exposed to certain ingredients in other common chemical services.^{[citation needed]}