Method of producing multicolor planographic printing surface

Abstract

Abstract A planographic printing surface capable of simultaneously printing more than one color is produced from light sensitive plates including at least one conductive metal layer by selectively exposing the light sensitive portion of the plate, developing the light exposed portions, removing either the exposed or nonexposed light sensitive portions, and then, as required, electrolytically coating, etching, or further exposing the portions of the plate thus revealed. Successive applications of this technique may be made. The process results in a planographic printing surface with portions which have differing surface energies and which portions are therefore susceptible to selective wetting by various colored inks having differing surface energies. Inking of the thus produced surface with inks which selectively wet specific portions of the surface, followed by bringing the surface into contact with a to-be-printed article results in a multicolor print in a single pass. In preferred printing processes, the various inks having varying surface energies are mutually nonmiscible with one another.

Inventors

• 👤 H Anderson
• 👤 E Bartkus

Bibliographic Details