. . "A nail varnish consisting essentially of nitrocellulose, a film forming resin, a plasticizer, a gelling agent and a solvent-diluent system wherein the film forming resin includes an arylsulphonylurethane which is a member selected from the group consisting of poly(arylsulphonylurethanes) of formula (II) ##STR36## wherein n is an integer and 2 . .