Photodevelopable silver halide material
AssigneeAgfa-Gevaert
InventorsHendrik Alfons Borginon, Willy Joseph Vanassche
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Abstract
Direct-print images of improved stability against prolonged light-exposure are obtained in a photodevelopable element by spectrally sensitizing the photodevelopable emulsion, providing in the emulsion layer or a superposed layer a compound absorbing radiation in the inherent sensitivity range of the silver halide, and effecting image-wise exposure with radiation comprising light of the spectral range for which the silver halide has been spectrally sensitized.
Claims18
Photographic element comprising a support bearing a radiation-sensitive silver halide emulsion layer wherein the emulsion layer is a direct-print photodevelopable silver halide emulsion layer containing at least one spectrally sensitizing dye to provide an extra range of sensitivity in the green and/or red regions of the spectrum, and wherein at least one dye compound absorbing radiation in the inherent sensitivity range of the silver halide is or are present in the silver halide emulsion layer and/or in a superposed layer, so as to be effective for protecting a photodeveloped image, when formed in the said element, from deterioration by prolonged exposure to light.
Method of improving the stability of direct-print images formed by photodevelopment of an image-wise exposed photographic element comprising a support and one radiation-sensitive silver halide emulsion layer, the method precluding a special treatment after photodevelopment and comprising the steps of:
- spectrally sensitizing the silver halide emulsion layer for the green and/or red regions of the spectrum;
- providing in said silver halide emulsion layer and/or in a layer coated over the silver halide emulsion layer a dye compound absorbing radiation in the inherent sensitivity range of the silver halide;
- effecting image-wise exposure with radiation comprising light of the spectral range for which the silver halide has been spectrally sensitized and photodeveloping.
Dependencies are inferred from the claim text.