Tintenzusammensetzung und deren Verwendung in einem Verfahren zur Herstellung einer lithographischen Druckplatte.

摘要

The present invention provides a process for producing a lithographic printing plate which has excellent printing durability by way of ink-jet printing, and an aqueous ink composition therefor. The aqueous ink composition of the present invention has a surface tension of 30 to 35 dyn/cm, and comprises (a) a dye having an absorption wave length within 200 to 800 nm in the photosensitive wave length range of a positive type photosensitive plate, (b) an evaporation controlling agent, and (c) a surfactant. The present invention also provides a process for producing a lithographic printing plate which comprises printing the above mentioned aqueous ink composition on a positive type photosensitive plate by ink-jet printing, and then exposing the printed plate to light, followed by developing.