Lithographic printing plate
AssigneeMitsubishi Paper Mills Limited
InventorsMasahiko Saikawa, Eiji Kanada, Kazunaka Endo
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Abstract
Disclosed is a method for plate-making which comprises imagewise exposing by scanning type flash exposure a lithographic printing plate comprising a support and at least a silver halide emulsion layer containing at least 70 mol % of silver chloride and prepared with addition of a water soluble iridium compound during emulsification or physical ripening of silver halide and a water soluble gold compound at any time before coating of the emulsion and thereafter subjecting the exposed emulsion to diffusion transfer development.
Claims17
A method for plate-making which comprises image-wise exposing by scanning flash exposure a lithographic printing plate comprising a support, a physical development nuclei containing surface layer and at least an unfogged silver halide emulsion layer containing at least 70 mol % of silver chloride and prepared with addition of a water soluble iridium compound during emulsification or physical ripening of the emulsion and a water soluble gold compound at any time before coating of the emulsion and thereafter subjecting the exposed emulsion to diffusion transfer development.
A method of printing which comprises printing in a printing machine with the lithographic printing plate made by image-wise exposing by scanning flash exposure a lithographic printing plate comprising a support, a physical developement nuclei containing surface layer and at least an unfogged silver halide emulsion layer containing at least 70 mol % of silver chloride and prepared with addition of a water soluble iridium compound during emulsification or physical ripening of the emulsion and a water soluble gold compound at any time before coating of the emulsion and thereafter subjecting the exposed emulsion of diffusion transfer development.
Dependencies are inferred from the claim text.