| 摘要 |
PROBLEM TO BE SOLVED: To provide an original plate for lithographic printing which has good on-machine development properties, high sensitivity, and high plate wear. SOLUTION: An imaging layer containing at least one component (1) selected from fine resin particles containing a compound having at least two vinyloxy groups and micro-capsules containing a compound having at least two vinyloxy groups, fine resin particles (2) containing a compound having a functional group crosslinking with the vinyloxy group by heat, a photothermal conversion agent (3), a hydrophilic resin (4), and an acid precursor is provided on a support. The photothermal conversion agent (3) is contained in the fine resin particles or the micro-capsules of the component (1), the photothermal conversion agent is cyanine coloring mater, the acid precursor is an onium salt compound, and the functional group crosslinking with the vinyloxy group by heat of the fine resin particles (2) is preferably an acidic group or a hydroxyl group. |
