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AssigneeAgfa-Gevaert
InventorsChristian C. Van de Sande, Andre Verhecken, Wilhelmus Janssens
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Photographic silver halide material containing a ballasted electron-donor precursor compound yielding by alkaline hydrolysis an electron-donor compound (ED-compound) capable (1) of donating electrons to an oxidized electron-accepting silver halide developing agent e.g. for scavenging it, said electron-donor precursor compound corresponding to the following general formula: ##STR1## wherein: R represents hydrogen or a substituent, e.g. an acyl group, which on hydrolytic removal allows the replacement of R by H, R.sup.1, R.sup.2 and R.sup.3 (same or different) are hydrocarbon substituents or R.sup.3 is H, and Z and Y represent the necessary atoms to close a benzene ring that may be substituted or form a fused ring system.
A photographic material comprising at least one light-sensitive silver halide emulsion layer containing at least one ballasted electron-donor precursor compound (EDP-compound) undergoing a cleavage reaction by alkaline hydrolysis to yield an electron-donor compound (ED-compound) capable of donating electrons to an electron-accepting oxidized silver halide developing agent, wherein said EDP-compound corresponds to the general formula:
An image receiving material useful in diffusion-transfer-reversal processing with exposed silver halide emulsion layer(s), wherein said material contains in a water-permeable binder layer an EDP-compound corresponding to the general formula:
An electron donor precursor compound, according to the following general formula:
Dependencies are inferred from the claim text.