Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Making printing plates
Patent
1988-09-09
1990-01-02
Dees, Jose G.
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Making printing plates
430307, 430309, 430394, 430396, 1014631, 101466, G03F 702
Patent
active
048913022
ABSTRACT:
Method of preparing a contoured plate by selectively hardening a photopolymer plate in a zone which is adjacent the lower surface of the plate and increases continuously in thickness from one portion of the plate to another by a first exposure of the upper surface of the plate to a quantity of light energy which increases continuously per unit area of the surface from said one portion of the plate to the other. Discrete portions of the upper surface of the plate are masked in the portions on which it is desired to form a recessed design, and the non-masked portions of the plate are hardened by a second exposure of its upper surface to light energy, so that the masked portions remain unhardened from their upper surface to the upper region of said hardened zone. The unhardened portions are removed to provide a recessed design in the upper surface of the plate. The design varies continuously in depth independently of the width of the design.
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"Miraclon" Brochure, Tokyo OHKA Kogyo C., Ltd.
Gordon Douglas C.
Rapkins David W.
Dees Jos,e G.
Loney Donald J.
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