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Process for Inhibiting Dyed Hair Fibers from Losing Their Color during Shampooing

SpecialChem / Jan 30, 2013

There are essentially two ways in which keratin fibers may be dyed: "permanent" dyeing and "semi-permanent" dyeing. The first, also known as oxidation dyeing, uses "oxidation" dye precursors, which are colorless or weakly colored compounds. Once mixed with oxidizing products, at the time of use, these precursors lead to colored compounds and dyes via a process of oxidative condensation. In this c

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