Lithographic printing plate with gelatin layers having pH values

Details Lithographic printing plate with gelatin layers having pH values Lithographic printing plate with gelatin layers having pH values

1983-04-20

1985-04-09

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430229, 430230, 430232, 430621, 430642, 101453, G03C 554, G03C 130, G03C 706

Patent

active

045102287

ABSTRACT:
Disclosed is a photosensitive element for the production of lithographic printing plates improved in printing endurance comprising a support, a physical development nuclei layer, and at least one gelatin-containing layer including a silver halide emulsion layer disposed under said nuclei layer, which is adapted to the silver complex diffusion transfer process to utilize the transferred silver image on said nuclei layer as ink-receptive areas, all of the gelatin-containing layers having a pH value below the isoelectric point of the gelatin used in each layer. Further improvement can be attained by using a photographic gelatin and a low molecular weight gelatin in at least one of said gelatin-containing layers.

REFERENCES:
patent: 3089770 (1963-05-01), Gunther et al.
patent: 4160670 (1979-07-01), Tsubai et al.
patent: 4175965 (1979-11-01), Yoshida et al.
patent: 4355090 (1982-10-01), Yamada et al.
patent: 4360590 (1982-11-01), Tomka
patent: 4401739 (1983-08-01), Senga et al.

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