Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1981-11-25
1984-10-16
Kittle, John E.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
430327, 430270, 427 541, 427143, 427243, G03F 712
Patent
active
044775571
ABSTRACT:
Stencils of a desired design are made by selective hardening of first and second individually soluble substances being hardenable in admixture in a foraminous stencil blank, which is initially impregnated with the first substance. The second substance is stored separately from such impregnated stencil blank, such as in a pen. This separately stored second substance is thereafter selectively applied in the form of the desired design to the impregnated stencil blank for admixture with the first substance only immediately prior to a desired selective hardening of the admixed first and second substances, to render part of the stencil imperforate. A stencil is also exposed to dissolution of any applied first and second substances outside of the latter part, for rendering the stencil perforate outside of that part.
REFERENCES:
patent: 457712 (1891-08-01), Hamburger
patent: 2557352 (1951-06-01), Kanitz
patent: 3246986 (1966-04-01), Borchers
Dees Jos,e G.
Kittle John E.
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