GUMMING COMPOSITIONS WITH NANO-PARTICLES FOR IMPROVING SCRATCH SENSITIVITY IN IMAGE AND NON-IMAGE AREAS OF LITHOGRAPHIC PRINTING PLATES

摘要

The process for improving the scratch-resistance of a lithographic printing plate, comprising: applying an aqueous composition comprising inorganic, non-metallic, inert particles composed of silica, alumina or titanium dioxide and having an average particle size of from 1 nm to 0.5 µm, to an exposed and optionally developed lithographic printing plate precursor.