Dry planographic plates for direct printing with elastomer under

Details Dry planographic plates for direct printing with elastomer under Dry planographic plates for direct printing with elastomer under

1982-07-30

1984-11-06

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Making printing plates

101456, 430271, G03F 710, B41M 100

Patent

active

044812825

ABSTRACT:
The invention provides a novel printing plate suitable for use in a dry-process direct planographic printing without the use of a blanket as used in offset printing and without the use of dampening water as in ordinary planographic printing. The printing plate of the invention is constructed with a substrate of which at least the surface layer is made of a rubbery elastomer with an oleophilic or ink-receptive surface and a pattern-wise layer of an ink-repellent material such as a silicone provided on the surface of the substrate to form the non-image areas of the printing plate while the image areas of the printing plate are formed by the oleophilic surface of the substrate exposed bare. By virtue of the rubbery elasticity of the surface layer of the substrate, satisfactorily sharp printed materials are obtained with the inventive printing plate without the use of a blanket as an intermediate carrier of the printing ink.

REFERENCES:
patent: 3886865 (1975-06-01), Ohto
patent: 3961947 (1976-06-01), Wells
patent: 4003312 (1977-01-01), Gunther
patent: 4019904 (1977-04-01), Noshiro et al.
patent: 4254209 (1981-03-01), Abe et al.

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