Cosmetic composition for imparting to human skin a coloration resembling a natural tan

Claim 1

A process for coloring human skin comprising applying to the skin in an amount sufficient to impart to said skin after exposure to ultraviolet rays a coloration resembling a natural tan a composition comprising a cosmetic vehicle suitable for topical application to the skin selected from the group consisting of (1) a hydroalcoholic solution containing 10-90 weight percent alcohol, (2) a glycerin-alcoholic solution containing 10-90 weight percent alcohol, (3) a glycerin-hydroalcoholic solution containing 10-90 weight percent alcohol, (4) an oleo-alcohol composition containing a vegetable oil, a lower alkyl ester and a lower alcohol having 1-4 carbon atoms, (5) an aqueous gel including a surfactant and a gel forming agent, and (6) an oil-in-water emulsion including a surfactant, an oil, a thickening agent and a humectant, and at least one compound selected from the group consisting of (a) a compound of the formula ##STR3## wherein R 1 and R 2 each independently represent hydrogen, a linear or branched alkyl having 1-18 carbon atoms, carbalkoxy having 2-5 carbon atoms, acyl having 2-5 carbon atoms, phenyl and phenyl substituted by a member selected from the group consisting of alkyl having 1-4 carbon atoms and hydroxy, and R 3 represents hydrogen, lower alkyl containing 1-6 carbon atoms, lower alkoxy containing 1-4 carbon atoms or halogen, with the proviso that R 1 , R 2 and R 3 are not hydrogen simultaneously; and (b) an acid addition salt of the compound in (a), said compound being present in an amount of 0.5-10 percent by weight of said composition, and said composition having a pH between 3 and 8.5, and exposing the skin to ultraviolet rays for a time effective to develop said color on said skin.