| 摘要 |
Provided is a directly imageable waterless planographic printing plate precursor that comprises at least a heat sensitive layer and a silicone rubber layer formed on a substrate in this order and has a high sensitivity not only immediately after the precursor production but also after the passage of time. In the directly imageable waterless planographic printing plate precursor, the heat sensitive layer contains liquid bubbles filled with a liquid with a boiling point in the range of 210 to 270°C. Also provided is a production method for the directly imageable waterless planographic printing plate precursor that comprises at least a step of applying a solution of a heat sensitive layer composition containing a solvent with a solubility parameter of 17.0 (MPa) 1/2 or less and a boiling point in the range of 210 to 270°C and a solvent with a solubility parameter of more than 17.0 (MPa) 1/2 over a substrate or a substrate coated with a resin layer, a step of drying said solution of a heat sensitive layer composition to form a heat sensitive layer, and a step of applying a silicone rubber layer composition over said heat sensitive layer to form a silicone rubber layer. |
