| 摘要 |
A planographic printing plate material comprising a substrate having a hydrophilic surface and a thermosensitive image formation layer on the hydrophilic surface, the thermonsensitive image formation layer being capable of changing from hydrophilic to hydrophobic by applying heat or light, wherein an electron donating color former and a water soluble electron accepting color developer are contained in the thermosensitive image formation layer or in another layer on the hydrophilic surface.
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