Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1986-11-12
1988-11-15
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...
430230, 430246, 430251, 430944, G03C 554, G03F 706
Patent
active
047849339
ABSTRACT:
Lithographic printing plates which have such a high sensitivity as permitting use of semiconductor laser beam of low output, a high resolving power and a high printing endurance and are free from occurrence of scumming are made by a method which comprises imagewise exposing a light sensitive material which comprises a support and at least a silver halide emulsion layer and a surface physical development nuclei layer provided on the support, said emulsion layer comprising silver halide grains which contain at least silver bromide and containing at least one sensitizing dye having a maximum spectral sensitivity in the region of longer than 700 .mu.m and then developing the exposed light sensitive material with a silver complex diffusion transfer developer containing at least a thiocyanate. Further improvement can be obtained by providing an antihalation means to keep the reflectance of a light of longer than 700 .mu.m at 13-40%.
REFERENCES:
patent: 3728114 (1973-04-01), Futaki et al.
patent: 4160670 (1979-07-01), Tsubai et al.
patent: 4297429 (1981-10-01), Kanada et al.
patent: 4501811 (1985-02-01), Saikawa et al.
Kanada Eiji
Kondo Toshiro
Nishinoiri Hiroshi
Saikawa Masahiko
Takaya Yoshikazu
Mitsubishi Paper Mills Ltd.
Schilling Richard L.
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