| abstract |
PROBLEM TO BE SOLVED: To form a polymerizable composition which forms a water-resistant film by being polymerized and cured with high sensitivity by exposure to laser light or the like, and has excellent removability of an unexposed portion, and recording layer of this polymerizable composition. The negative lithographic printing plate precursor and the lithographic printing method, which can be used for the above, can form an image with high sensitivity and have excellent on-press developability. A radically crosslinkable alkali-soluble polymer having a styrene group and an alkyleneoxy group in the side chain at the same time, preferably having a glass transition temperature (Tg) of 60 ° C. or lower, and a polymer containing the same Furthermore, it is preferable that this polymerizable composition contains (B) a polymerizable compound and (C) a polymerization initiator. [Selection figure] None |