Positive working photosensitive lithographic printing plate
AssigneeFuji Photo Film Co., Ltd.
InventorsSatoshi Takita, Mitsuhiro Imaizumi, Keiji Akiyama, Seiji Uno, Shiro Tan
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Abstract
A positive working photosensitive lithographic printing plate comprising an aluminum substrate and a positive working photosensitive layer, the aluminum substrate having been anodized and rendered water-wettable, wherein an intermediate layer containing a polymer comprising (A) a unit interacting with an alumina layer and (B) a unit interacting with a water-wettable layer is provided between the aluminum substrate and the photosensitive layer. The photosensitive layer and the water-wettable aluminum substrate have good adhesion so that the printing plate has a satisfactory press life.
Claims2
A positive working photosensitive lithographic printing plate comprising an aluminum substrate and a positive working photosensitive layer, said aluminum substrate having been anodized and rendered water-wettable and thereby having on its surface an alumina layer and a water-wettable layer, wherein an intermediate layer containing a polymer comprising (A) a unit having an acid radical interacting with said alumina layer and (B) a unit interacting with said water-wettable layer is provided between said aluminum substrate and said photosensitive layer.
Dependencies are inferred from the claim text.