Printing – Planographic – Lithographic plate making – and processes of making or using...
Patent
1998-04-27
2000-02-01
Funk, Stephen R.
Printing
Planographic
Lithographic plate making, and processes of making or using...
101455, 101457, 430 49, B41N 114
Patent
active
060190450
ABSTRACT:
The present invention provides a process for the preparation of a hot-melt ink jet process printing plate capable of printing many sheets of printed matters having a sharp image quality free of background stain. The present invention concerns a novel process for the preparation of an ink jet process lithographic printing plate which comprises preparing a direct imaging lithographic printing plate precursor comprising a water-resistant support having an image-receiving layer containing an inorganic pigment and a hydrophilic binder resin as main components provided thereon, and then jetting through a nozzle ink droplets obtained by heating and melting a solid ink composition at ordinary temperatures onto the image-receiving layer to form an image thereon by a hot-melt ink jet process, characterized in that the image-receiving layer comprises as the inorganic pigments a particulate silica having an average grain diameter of from 1 to 6 .mu.m and an ultrafinely particulate colloidal inorganic pigment having an average grain diameter of from 10 to 50 nm in a weight ratio of 40:60 to 70:30 and as the hydrophilic binder resin gelatin in a weight ratio of 85:15 to 40:60 relative to that of the inorganic pigments and thus exhibits water resistance attained by the curing action of a gelatin-curing compound.
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Kato Eiichi
Ohishi Hiroyuki
Fuji Photo Film Co. , Ltd.
Funk Stephen R.
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