Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1980-11-26
1982-08-31
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430217, 430224, 430502, 430505, 430509, G03C 554
Patent
active
043473016
ABSTRACT:
The present invention is directed to photosensitive elements and to diffusion transfer film units employing said elements wherein said photosensitive element includes a plurality of essential layers, including a first photosensitive silver halide layer and a second photosensitive silver halide layer, said first and second silver halide layers being sensitized to substantially the same spectral absorption range; a spacer layer intermediate and contiguous to said first and second silver halide layers, said spacer layer consisting essentially of inert particles which are substantially non-swelling in alkali, and substantially non-film forming; wherein said inert particles are equal to or less than the average diameter of the silver halide grains in said first and second silver halide layers and wherein said silver halide grains are 2.5 microns or less in average diameter; said first and second silver halide layers having associated therewith a dye image-forming material which is diffusible during processing as a function of the point-to-point degree of silver halide exposure to actinic radiation.
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patent: 3695882 (1972-10-01), Kumai et al.
patent: 3785815 (1974-01-01), Autges et al.
patent: 3960558 (1976-06-01), Cardone
patent: 4003744 (1977-01-01), Kliem
Brown J. Travis
Kiely Philip G.
Polaroid Corporation
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