Instant high contrast imaging system

Details Instant high contrast imaging system Instant high contrast imaging system

1989-10-30

1992-06-09

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

346 75, 346140R, 3461351, 358296, 1014631, G01D 1516, H04N 121, B41M 500

Patent

active

051211319

ABSTRACT:
A system and method of creating transmissive images in a developed photographic film is disclosed. A light-sensitive silver halide emulsion is developed to form an opaque surface layer of fine silver grains with a clear underlayer supported on a transparent substrate. Transmissive images are created in the opaque surface layer by selectively applying an oxidizing solution which oxidizes the silver grains to silver ions which are poor absorbers of light. The underlayer absorbs excess oxidizing solution with little or no swelling. The oxidizing solution may be dispersed by a modified ink-jet printer. The imaged film has high contrast and can be directly used without further processing in color printing plate making systems and other applications requiring a transmissive film or mask.

REFERENCES:
patent: 4694302 (1987-09-01), Hackleman et al.
patent: 4753864 (1988-06-01), Bouldin et al.
patent: 4770967 (1988-09-01), Vackier

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