US Patent No. 9,198,850 B2; Chanel Parfums Beaute has patented a cosmetic method for gradually releasing an amount of active principle on skin by exchange with ions of said active principle, all day long, under standard conditions, in order to provide at least one cosmetic benefit to the skin. The method calls for applying onto skin a composition consisting of, in a cosmetically acceptable medium, at least one resinate including one organic ion-exchange resin and at least one ionizable cosmetic active principle bonded in noncovalent fashion to said resin. The ionizable cosmetic active principle bonded in noncovalent fashion to the resin is selected from the group consisting of glycolic acid as an anionic active principle, cobalamin as a cationic active principle, lactic acid as an anionic active principle, gluconic acid as an anionic active principle, citric acid as an anionic active principle, ascorbic acid as an anionic active principle, gallic acid as an anionic active principle, pyrrolidonecarboxylic acid as an anionic active principle, zinc as a cationic active principle, vanillic acid as an anionic active principle and escin as an anionic active principle.

The cosmetic benefit is selected from the group consisting of smoothing wrinkles and/or fine lines, firming the skin, reducing perspiration and/or unpleasant odors, reducing sebaceous secretion or comedons, alleviating cutaneous discomfort selected from the group consisting of red blotches, tightness, tingling and combinations thereof, depigmenting, slimming of the body and a keratolytic effect.