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.
