Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Readily visible image formation
Patent
1984-07-27
1986-01-28
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Readily visible image formation
430 6, 430273, 430270, 430275, 430279, 430325, 430331, 1566591, 1566611, G03C 516, G03C 524, G03C 538, G03C 168
Patent
active
045671290
ABSTRACT:
Process for preparation of dot-etched photopolymerizable lithographic film which comprises (a) exposing imagewise a photopolymerizable element consisting essentially of a support and two layers of caustic soluble photopolymer, the upper layer being clear and the lower layer having dispersed therein a chemically soluble pigment, e.g., iron oxide; and optionally an overcoat layer; (b) developing the exposed element with caustic solution; and (c) treating the developed element with a chemical solubilizing agent for the pigment thereby reducing the size of the pigmented area by diffusion etching. A dot-etched lithographic film is prepared.
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patent: 4008084 (1977-02-01), Ikeda et al.
patent: 4094679 (1978-06-01), Washizawa et al.
patent: 4138262 (1979-02-01), Wacks et al.
patent: 4472494 (1984-09-01), Hallman et al.
E. I. Du Pont de Nemours and Company
Hamilton Cynthia
Kittle John E.
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