Opaque jet ink printing method and composition

A process for opaque jet printing comprising:

• providing a uniform printable substrate;
• providing supply of jet ink comprising from 2% to 60% by weight of a resin or mixture thereof, from about 40% to about 90% of a solvent selected from the group consisting of aliphatic alcohols, ketones, hydrocarbons, and mixtures thereof, up to about 5% of an electrolyte, up to about 10% of a dye or other coloring material, and up to about 40% of a slow evaporating solvent selected from the group consisting of substituted and unsubstituted heterocyclic compounds having 5 or 6 membered rings and from 1 to 3 oxygen or nitrogen atoms in the ring, at least one of said dye and said electrolyte being present in said ink, said ink exhibiting a viscosity of from 0.5 to 25 cp. at 25.degree. C. and having a resistivity of up to 10,000 ohm-cm.;
• forming a jet of discrete droplets of said ink;
• directing said jet toward said substrate;
• modulating the density of said jet by applying an electric field thereto in accordance with information to be recorded;
• printing said information on said substrate;
• applying a coating of an opacifying solvent, before the solvents in the ink have evaporated, the solvents in the ink being miscible in the opacifying solvent, and the resin being immiscible in the opacifying solvent;
• and
• drying the thus opacified printed information.