| abstract |
A method of preparing a cosmetic or pharmaceutical composition comprising mixing with an ionizable collagen salt, and insoluble in water, at least one cosmetic or pharmaceutical ingredient in an amount sufficient to communicate its characteristic cosmetic or therapeutic property to the composition, having been prepared the collagen salt ionizable and insoluble in water by treatment of a natural, fibrous and non-denatured collagen with an aqueous solution of an ionizable acid having a ph between 1.7 and 2.6 and comminution of the collagen treated in the aqueous solution until that at least 10% by weight of said salt have a particle size that does not exceed one micron, said ionizable salt forming a 0.5% gel, which has a ph of 3.2 + 0.2 and a viscosity substantially stable for at least 100 hours at 5ºC when dispersed in water and stored in a closed container. (Machine-translation by Google Translate, not legally binding) |