Abstract: A cosmetic composition which provides a semi-permanent, crosslinked film on a keratinous substrate comprising a film-forming polymer having functional groups capable of cross-linking upon exposure to a cross-linking agent reactive with the functional groups; a cross-linking agent reactive with the functional groups of the film-forming polymer; a dissipatable blocking agent which is operable prior to dissipation, to block the cross-linking agent from cross-linking the functional groups of the film-forming polymer, and which, after dissipation, leaves the cross-linking agent free to cross-link the functional groups of the film-forming polymer.

Abstract: A cosmetic composition which provides a semi-permanent, crosslinked film on a keratinous substrate comprising a film-forming polymer having functional groups capable of cross-linking upon exposure to a cross-linking agent reactive with said functional groups; a cross-linking agent reactive with said functional groups of the film-forming polymer; a dissipatable blocking agent which is operable prior to dissipation, to block the cross-linking agent from cross-linking the functional groups of the film-forming polymer, and which, after dissipation, leaves the cross-linking agent free to cross-link the functional groups of the film-forming polymer.

Abstract: A cosmetic composition which provides a semi-permanent, crosslinked film on a keratinous substrate, comprising a film-forming polymer having functional groups capable of cross-linking upon exposure to a cross-linking agent reactive with the functional groups; a cross-linking agent reactive with the functional groups of the film-forming polymer; a dissipatable blocking agent which is operable prior to dissipation, to block the cross-linking agent from cross-linking the functional groups of the film-forming polymer, and which, after dissipation, leaves the cross-linking agent free to cross-link the functional groups of the film-forming polymer.

Abstract: A composition in the form of an anhydrous emulsion having as a dispersed phase ascorbic acid dissolved in a nonaqueous polar organic solvent, and as the continous phase a nonaqueous nonpolar organic solvent, as well as a method for dissolving ascorbic acid.

Abstract: A composition in the form of an anhydrous emulsion having as a dispersed phase ascorbic acid dissolved in a nonaqueous polar organic solvent, and as the continous phase a nonaqueous nonpolar organic solvent, as well as a method for dissolving ascorbic acid.

Abstract: A cosmetic composition which provides a semi-permanent, crosslinked film on a keratinous substrate, comprising a film-forming polymer having functional groups capable of cross-linking upon exposure to a cross-linking agent reactive with said functional groups; a cross-linking agent reactive with said functional groups of the film-forming polymer; a dissipatable blocking agent which is operable prior to dissipation, to block the cross-linking agent from cross-linking the functional groups of the film-forming polymer, and which, after dissipation, leaves the cross-linking agent free to cross-link the functional groups of the film-forming polymer.

Abstract: A cosmetic composition which provides a semi-permanent, crosslinked film on a keratinous substrate, comprising a film-forming polymer having functional groups capable of cross-inking upon exposure to a cross-linking agent reactive with said functional groups; a cross-linking agent reactive with said functional groups of the film-forming polymer; a dissipatable blocking agent which is operable prior to dissipation, to block the cross-linking agent from cross-linking the functional groups of the film-forming polymer, and which, after dissipation, leaves the cross-linking agent free to cross-link the functional groups of the film-forming polymer.

Abstract: A composition in the form of an anhydrous emulsion having as a dispersed phase ascorbic acid dissolved in a nonaqueous polar organic solvent, and as the continous phase a nonaqueous nonpolar organic solvent, as well as a method for dissolving ascorbic acid.

Abstract: A method for reducing the formation of sunburn cells in mammalian skin exposed to ultraviolet radiation, comprising applying a cosmetic composition containing stabilized ascorbic acid to the the skin prior to exposure to ultraviolet radiation.

Abstract: A nail strengthening composition comprising, by weight of the total composition:a) 0.1-60% by weight of a permeation/binding agent,b) 0.001-20% of a thio cross-linking agent,c) 0.001-20% of a chelating agent.

Abstract: A nail strengthening composition comprising, by weight of the total composition:a) 0.1-60% by weight of a permeation/binding agent,b) 0.001-20% of a thio cross-linking agent,c) 0.001-20% of a chelating agent.