| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a lithographic printing method which can directly record an image from digital data by using a lithographic printing plate original plate being able to record images with an infrared laser, and can perform an on-board development. <P>SOLUTION: This lithographic printing method has a process in which this lithographic printing plate original plate having a recording layer containing at least (A) an infrared ray absorbing agent (B) a polymerization initiator represented by general formula (1) and (C) a polymeric compound is exposed with the infrared laser, and a printing process in which printing is performed by feeding an oily ink and a water-soluble component to the lithographic printing plate original plate after the exposure without applying any kind of developing treatment. In the middle of the printing process, a non-exposed section of the recording layer is eliminated. In general formula (1), X represents a bivalent combining group, and Y, Q and Z each independently represent a monovalent substituent comprising a hydrogen atom or a non-metal atom. X preferably represents a carbonyl group, a sulfone group or a sulfoxide group, Y preferably represents an alkyl group, an alkenyl group, an alkynyl group, an aryl group, a benzoyl group or a heterocyclic group. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
