Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1975-07-02
1980-01-29
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430233, 430231, 430246, 430216, G03C 554, G03C 148, G03C 302, G03C 524
Patent
active
041860055
ABSTRACT:
This invention is directed to a film unit composed of a support carrying on one side a processing composition permeable layer containing an acid reacting reagent therein, and, on the other side, silver precipitating nuclei and photosensitive silver halide crystals. The above film unit is particularly suitable for use as motion picture film, i.e., in the form of an elongated web wherein said film unit is unwound, exposed, contacted with a photographic processing composition containing, e.g., a silver halide developing agent and silver halide solvent, rolling said film unit upon itself thereby contacting the processing composition permeable layer with the layers on the opposite side of the support. The acid reacting agent will diffuse into the silver halide and nuclei containing layers providing enhanced stability to the film unit.
In a preferred embodiment, the film unit of the present invention includes an additive color screen intermediate the support and the silver precipitating nuclei and photosensitive silver halide crystals.
REFERENCES:
patent: 2740717 (1956-04-01), Yutzy et al.
patent: 2882151 (1959-04-01), Yutzy et al.
patent: 3220841 (1965-11-01), Stevens
patent: 3240604 (1966-03-01), Cook
patent: 3313625 (1967-04-01), Ryan
patent: 3615127 (1971-10-01), Land
patent: 3615426 (1971-10-01), Debruyn
patent: 3677753 (1972-07-01), Francis et al.
The Focal Encyclopedia of Photography, c1969, Desk Edition, McGraw-Hill Book Co., N.Y. pp. 50 and 371.
Haberlin Richard J.
Stephens Robert K.
Kiely Philip G.
Polaroid Corporation
Schilling Richard L.
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