LITHOGRAPHIC PRINTING

摘要

A concentrate for dilution with water to obtain a fountain solution for lithographic printing comprises a lithographic desensitising material dissolved in a vehicle liquid comprising an organic solvent liquid optionally in admixture with water. Preferred desensitising materials are organo substituted ammonium salts of desensitising acids and a preferred organic solvent liquid is isopropyl alcohol. The fountain solution obtained on dilution of the concentrate may be used with printing machines having integrated damping/inking equipment.