Where the ink of the invention comprises an organic solvent, such as methyl ethyl ketone, cyclohexanone or cyclopentanone or a mixture of thereof, examples of a preferred binder polymer include, without limitation, crosslinkable copolymers prepared from one of the following pairs of monomers: hydroxyethyl methacrylate (HEMA)/ethoxyethyl methacrylate (EOEMA); vinyl alcohol/vinyl butyral; vinyl alco