Patent ID: 8608808

Claim:
A method for dyeing keratinous fibers comprising applying to the keratinous fibers, in one or more stages, at least one cosmetic composition comprising, together or separately: (a) at least one ortho-diphenol derivative; (b) at least one metal derivative chosen from metal salts, metal complexes, metal oxides, metal oxoanions, their supported forms, their hydrates and their mixtures, wherein the metal is chosen from: i) gold (Au), ii) molybdenum (Mo), iii) silver (Ag)(I) and (II), iv) tungsten (W), v) vanadium (V), vi) ruthenium (Ru), vii) magnesium (Mg)(II), viii) cerium (Ce), ix) rhenium (Re), x) titanium (Ti), xi) silicon (Si), xii) tin (Sn), xiii) zirconium (Zr), xiv) niobium (Nb), xv) indium (In), xvi) selenium (Se), and xvii) aluminium (Al); and (c) at least one basifying agent; wherein the pH of the composition comprising the at least one basifying agent is alkaline.