Light-sensitive lithographic printing plate precursor
AssigneeFuji Photo Film Co., Ltd.
InventorsKeisuke Shiba, Sho Nakao, Tadao Toyama
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Abstract
The formation of spots when making a printing plate using a presensitized printing plate comprising a silver halide light-sensitive layer formed on an aluminum support having an aluminum oxide film on the surface directly or over a non-silver light-sensitive intermediate layer is effectively prevented by incorporating a mercapto compound in one of the layers.
Claims11
A light-sensitive lithographic printing plate precursor comprising an aluminum support having an aluminum oxide film on the surface thereof and having formed thereon a silver halide-containing light-sensitive layer, wherein the mean weight of said aluminum oxide film is at least 1 g/m.sup.2, and at least one layer on said support contains a heterocyclic mercapto compound and the total amount of said compound is at least 1 millimol per mol of silver halide sufficient to prevent the formation of spots during the process of making a printing plate from said light sensitive lithographic printing plate precursor.
Dependencies are inferred from the claim text.