Cosmetic process for caring for and/or making up keratin materials The present invention relates to a cosmetic process for caring for and/or making up keratin materials, comprising at least the steps consisting in: (i) placing all or part of the surface of the said keratin material in contact with an effective amount of at least one emollient active agent chosen from ionic liquids based on guanidinium or dialkylimidazolium, non-volatile or sparingly volatile oils, waxes, thiol derivatives, phosphines, alkaline bases chosen from potassium hydroxide, ammonia, monoethanolamine, triethanolamine, calcium hydroxide, alkaline salts of amino acids, urea and urea derivatives, and guanidine derivatives, and mixtures thereof, (ii) placing the said surface in contact with at least one cosmetic active agent, different from the said emollient active agent, to be incorporated into the keratin at the surface of the said keratin material, and (iii) where appropriate, heating the said surface of the keratin material, steps (ii) and (iii) possibly being performed, independently of each other, prior to, simultaneously with or consecutive to step (i).