Lithographic printing plate
AssigneeMitsubishi Paper Mills Limited
InventorYoshihito Ohashi
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Abstract
There is disclosed a lithographic printing plate which comprises a grained and anodized aluminum support, a silver halide emulsion layer and a physical development nuclei layer between the aluminum support and the silver halide emulsion layer, and at least one selected from the group consisting of a phosphoric acid compound having a polyoxyalkylene unit and a water-soluble vinyl polymer having a carboxylic acid ester group being contained between the aluminum support and the silver halide emulsion layer.
Claims10
A lithographic printing plate comprising a grained and anodized aluminum support, a silver halide emulsion layer and a physical development nuclei layer provided between said aluminum support and said silver halide emulsion layer, and at least one selected from the group consisting of a phosphoric acid compound having a polyoxyalkylene unit, a water-soluble vinyl polymer having a carboxylic acid ester group represented by the following formula (II):
- wherein R3 represents a hydrogen atom or a methyl group;
- R4 represents a straight or branched alkyl group having 1 to 20 carbon atoms or an aryl group;
- A represents a vinyl monomer unit having a carboxyl group, a sulfo group, a hydroxyl group, or a salt thereof, or an amide group at the side chain;
- B represents a copolymerizable monomer unit;
- p is 10 to 90% by weight;
- q is 90 to 10% by weight and r is 0 to 50% by weight, and
- a water-soluble vinyl polymer having a carboxylic acid ester group represented by the following formula (III) as a recurring unit:
- wherein R5 represents a straight or branched alkyl group having 1 to 20 carbon atoms or an aryl group;
- and M represents a hydrogen atom, an alkali metal or an ammonium group,
- being contained between said aluminum support and said silver halide emulsion layer.
Dependencies are inferred from the claim text.