| abstract |
PROBLEM TO BE SOLVED: To provide a high sensitivity, excellent printing durability and excellent stain resistance due to a strong adhesion between a strong photosensitive layer and a support, and a large amount even if the plate surface ink is removed by a plate cleaner. The present invention provides a negative photopolymerizable lithographic printing plate precursor that does not cause fine lines and highlights even when printed, and can be directly laser-written. SOLUTION: An aluminum support contains an alkali-soluble urethane binder having an ethylenically unsaturated polymerizable group in a side chain, a compound having an addition-polymerizable ethylenically unsaturated double bond, and a photopolymerization initiator. It has a photopolymerizable photosensitive layer, and the urethane binder is a reaction product of a diisocyanate compound and a diol compound having an ethylenically unsaturated polymerizable group. |