| 摘要 |
The present invention provides a polymerizable composition comprising (A) a compound including a polymerizable unsaturated group and (B) a macromolecular compound including, at a side chain thereof, a structure represented by the following general formula (I). The present invention also provides a negative type planographic printing plate precursor responsive to an infrared laser, the precursor being superior in recording sensitivity and printing durability and using the polymerizable compound as a recording layer. General Formula (I) Z<->M<+> wherein Z<31 > represents COCOO<->, COO<->, SO3<-> or SO2-N<->-R where R represents a monovalent organic group and M<30 > represents an onium cation.
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