| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a polymerizable composition which ensures less sensitivity variation and is stable even under severe storage conditions, and a planographic printing plate original using the polymerizable composition as a recording layer and excellent in temporal stability. <P>SOLUTION: The polymerizable composition comprises (A) a binder polymer, (B) a polymerizable compound having an unsaturated group, and (C) a diaryl iodonium salt having at least two electron-donating groups. The iodonium salt (C) preferably has three or more electron-donating groups. This polymerizable composition is useful as a recording layer of a negative type planographic printing plate original. <P>COPYRIGHT: (C)2007,JPO&INPIT |
