| 摘要 |
<p>The invention provides a planographic printing plate precursor including a photosensitive layer containing an infrared absorbent, a polymerization initiator, a polymerizable compound, and a binder polymer, and a protective layer containing an inorganic layered compound, formed in this order on a surface of a hydrophilic aluminum support, wherein at least one of the photosensitive layer and the protective layer contains a phosphonium compound.</p> |
