Method for forming a transparent image on a sheet

Details Method for forming a transparent image on a sheet Method for forming a transparent image on a sheet

1972-12-15

1976-01-27

Welsh, John D.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 12, 204 2, 178 62, 428263, 427273, 427277, B41C 308

Patent

active

039353338

ABSTRACT:
A transparent image forming sheet and method for forming transparent images on the sheet, in which the sheet comprises a transparent film base, an opaque conductor layer being formed on one side of the transparent film base and a semiconductive layer containing powder of metallic oxide semiconductor, a mixture of non-conductive metallic compound and conductive substance, or polymeric semiconductor, and the method comprises the steps of applying electric voltage between the semiconductive layer and the conductor layer through recording stylus and development using corrosive liquid and/or dissolving solvent.
The transparent image sheet can be used for several optical purposes including the preparation of a printing plate for photographs without the screen process.

REFERENCES:
patent: 2884313 (1959-04-01), Browne
patent: 3122448 (1964-02-01), Hills et al.

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