Cosmetic compositions exhibiting characteristic first...

A - Human Necessities – 61 – K

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A61K 8/18 (2006.01) A61K 8/02 (2006.01) A61K 8/11 (2006.01) A61K 8/19 (2006.01) A61K 8/29 (2006.01) A61K 8/40 (2006.01) A61K 8/46 (2006.01) A61K 8/49 (2006.01) A61K 8/891 (2006.01) A61K 8/898 (2006.01) A61K 8/98 (2006.01) A61Q 1/02 (2006.01) A61Q 1/06 (2006.01)

Patent

CA 2449295

Cosmetic compositions and cosmetic compositions that have been adapted for delivery to provide applied cosmetic compositions that have a spectrophotometric curve, wherein a first derivative of the spectrophotometric curve comprises: a) a maximum peak in the region of from about 430 nm to about 520 nm occurs at a wavelength not greater than about 480 nm; b) a maximum peak in the region of from about 420 nm to about 650 nm occurs at a wavelength of from about 570 nm to about 630 nm; and c) a minimum valley in the region of from about 520 nm to about 580 nm has a D%R/D of less than or equal to about 0.03, wherein R is reflectance and is wavelength, and wherein the cosmetic composition comprises a mixture of at least two colorants, wherein a first derivative of a spectrophotometric curve of each of the individual colorants does not exhibit (a), (b) and (c). Methods for providing such compositions comprise adding colorants to a cosmetic composition to provide the composition with a spectrophotometric curve as described.

L'invention concerne des compositions cosmétiques et plus particulièrement des compositions cosmétiques conçues pour l'application, qui une fois appliquées présentent une courbe spectrophotométrique dont dérivée première comprend : a) un pic maximal dans un intervalle compris entre 430 nm et 520 nm environ pour une longueur d'onde ne dépassant pas 480 nm environ, b) un pic maximal dans un intervalle compris entre 420 nm et 650 nm environ pour une longueur d'onde comprise entre 570 nm et 630 nm environ, et c) un pic négatif minimal dans un intervalle compris entre 520 nm et 580 nm, pour lequel .DELTA. %R/.DELTA..lambda. est inférieur ou égal à environ 0,03, R représentant le facteur de réflexion, et .lambda. représentant la longueur d'onde. Cette composition cosmétique comprend un mélange d'au moins deux colorants, la dérivée première de la courbe spectrophotométrique de chacun de ces colorants individuels ne présentant pas les caractéristiques (a), (b) et (c). L'invention concerne également des procédés permettant de produire de telles compositions, ces procédés consistant à ajouter des colorants à une compositions cosmétique afin de conférer la courbe spectrophotométrique décrite à cette composition.

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