Metallic coating process for giving keratin fibres shampoo-remanent cosmetic properties

Process according to any one of the preceding claims, characterized in that the metal salt is an organic or mineral, acidic or basic salt.

Process according to any one of the preceding claims, characterized in that the metal salt is chosen from nitrates, sulphates, carbonates, halides, bromates, phosphates and sulphonates.

Process according to any one of the preceding claims, characterized in that the metal salt is chosen from AgNO3, AgBrO3, Ag2SO4, AgBr, Ag2CO3, AgCl, AgF, AgI, HAuCl4, AuBr3, AuCl3, K2PdCl4, CuCl, CuBr, CuSO4 and Na2PtCl6, and mixtures thereof.

Process according to any one of the preceding claims, characterized in that the metal salt is chosen from HAuCl4, AgNO3, K2PdCl4 and Na2PtCl6, and mixtures thereof.

Process according to any one of the preceding claims, characterized in that the reducing agent is chosen from mineral or organic reducing agents.

Process according to any one of the preceding claims, characterized in that the reducing agent is chosen from NaBH4, KBH4, BH3, NADPH, NADH, H2, 9-BBN (9-borabicyclo[3.3.1]nonane), LiAlH4, NaAlEt2H2, Na2S2O3, diisoamylborane, ascorbic acid and cyclic or aliphatic compounds containing the enediol chemical group —(OH)C═C(OH)— including the isomeric forms, salts thereof and esters thereof, hydroquinone, benzoquinone, NaBH(OAc)3, formamidinesulphinic acid (FASA), N-phenylformamidinesulphinic acid, phosphines, NaBH3CN, Na2S2O4, BMS (bismercaptoethyl sulphone), DTT (dithiothreitol), DMH (N,N′-dimethyl-N,N′-bis(mercaptoacetyl)hydrazine), thiols, thiolates, citrates, sulphites, bisulphites, monopersulphates and bisulphates of alkali metals, enzymes (such as, for example, the protein disulphide isomerase or thioredoxine), and sulphinates.

Process according to any one of the preceding claims, characterized in that the metal salt(s) and the reducing agent(s) are present at a concentration of between 0.0001% and 50%, preferably between 0.01% and 10% and more preferably between 0.05% and 5%, relative to the cosmetically acceptable medium.

Process according to any one of the preceding claims, characterized in that the cosmetically acceptable medium consists of water and/or an organic solvent chosen from the group comprising C1-C4 alcohols such as ethanol or isopropanol, C5-C10 alkanes, acetone, methyl ethyl ketone, methyl acetate, butyl acetate, ethyl acetate, dimethoxyethane and diethoxyethane, and mixtures thereof.

Process according to any one of the preceding claims, characterized in that the cosmetically acceptable medium also comprises common cosmetic additives chosen especially from adhesives, thickeners, softeners, antifoams, sunscreens, antiperspirants, acidifying agents, moisturizers, basifyiing agents, colorants, pigments, fragrances, preserving agents, anionic, cationic, nonionic or amphoteric surfactants, fixing polymers, especially nonionic, cationic or amphoteric fixing polymers, non-fixing polymers, volatile or non-volatile silicones, plant, animal, mineral or synthetic oils, proteins, vitamins and polyols, and mixtures thereof.

Process according to any one of the preceding claims, characterized in that:

• a composition containing at least one metal salt, in a cosmetically acceptable medium, is applied to the keratin fibres,
• after an action time ranging from 30 seconds to 30 minutes, and optional rinsing, a composition containing at least one reducing agent, in a cosmetically acceptable medium, is applied under the optional action of heat,
• after a further action time of 30 seconds to 30 minutes, under the optional action of heat, the fibres are rinsed.