| abstract |
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): n nZ − M + General formula (I) n nwherein Z − represents COCOO − , COO − , SO 3 − , or SO 2 —N − —R where R represents a monovalent organic group and M + represents an onium cation. 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. |