Process for the preparation of ink jet process printing plate

Details Process for the preparation of ink jet process printing plate Process for the preparation of ink jet process printing plate

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.

REFERENCES:
patent: 5072671 (1991-12-01), Schneider et al.
patent: 5503953 (1996-04-01), Ito et al.
patent: 5582106 (1996-12-01), Kanda et al.
patent: 5677098 (1997-10-01), Nakayama et al.
patent: 5714250 (1998-02-01), Kato et al.
patent: 5852975 (1998-12-01), Miyabe et al.

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