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 ...