Ink for ink jet-recording curable through irradiation and method for preparing lithographic printing plates using the same

摘要

An ink jet-recording ink capable of being cured through the irradiation with a radioactive ray, in which the ink jet-recording ink comprises a coloring material, a polymerizable compound and a polymerization initiator system, wherein the polymerization initiator system comprises a polymerization initiator and at least one co sensitizing agent selected from the group consisting of compounds represented by the foregoing general formulas (i) to (iv) and (vii) to (ix), as well as a method for preparing a lithographic printing plate comprises the steps of (1) A step for injecting an ink jet-recording ink as set forth in claim 1 on the surface of the substrate; and (2) A step for curing the ink by the irradiation of the substrate carrying the injected ink thereon with a radioactive ray to thus form an image of cured ink on the substrate. The ink is highly sensitive to a radioactive ray, permits the formation of a high quality image and has excellent storage stability. In addition, the method permits the formation of a high quality image excellent in the printing durability.