Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1980-07-28
1981-12-15
Brown, J. Travis
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430443, 430505, 430544, 430957, G03C 700
Patent
active
043060153
ABSTRACT:
A process for the production of an improved photographic image is provided which comprises imagewise exposing photographic material which comprises on a support base at least one light-sensitive negative-working silver halide emulsion layer containing a color coupler (receptor layer) and in which after color processing a negative dye image only is formed, there being associated therewith at least one light-sensitive negative-working silver halide emulsion layer containing at least one DIR compound (development inhibitor releasing compound) and in which after processing no photographic image is present (donor layer), developing the photographic material in a color photographic developing solution to form a negative silver image in the layer which comprises the DIR compound and a coupled compound with the DIR compound in the areas in which the silver has been developed, so releasing the DI compound imagewise from the DIR compound and allowing the DI compound to diffuse imagewise into the layer containing the color coupler thereby to modify color development in this layer by forming a modified negative silver image and hence a modified negative dye image in the layer which comprises the color coupler, and further processing the material so that no photographic image is present in the layer which comprises the DIR compound and no silver image is present in the layer which comprises the color coupler and the dye image.
REFERENCES:
patent: 3227551 (1966-01-01), Barr et al.
patent: 3632345 (1972-01-01), Marx et al.
patent: 3928041 (1975-12-01), Fujiwhara et al.
patent: 3932185 (1976-01-01), Matsura
patent: 4015988 (1977-04-01), Shiba et al.
The Theory of the Photographic Process, 4th Ed., James, pp. 358-361, Macmillan, N.Y., 1977.
Brown J. Travis
Ciba-Geigy AG
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