Process and composition for the coloration of keratin-containing substances
AssigneeSociete Nationale Elf Aquitaine
InventorsJean-Marie Cotte, Philippe Potin
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Abstract
A process and composition for coloring substances and tissues containing keratin, by means of an agent or co-reactant having a ketone or aldehyde function. An amino-acid, in particular a thio-amino-acid, is contacted with the substance to be colored. The composition can be in the form of a solution or a suspension containing the amino-acid, applicable separately from or together with the co-reactant of known type based on a ketone or aldehyde. The invention is useful in cosmetics, for tanning the skin or coloring the hair or nails. It is also applicable to the coloration of various articles, in particular hair in general, feathers, horn, shell etc.
Claims14
A process for the colouration of a keratin-containing substance or tissue by means of a colouration agent having a ketone or aldehyde function favouring the development of colouration in the substance or tissue, in which an amino-acid is applied to the latter before, during or after treatment with the colouration agent, wherein the amino-acid contains a sulphoxy group.
Dependencies are inferred from the claim text.