Color photographic silver halide material
AssigneeAgfa-Gevaert
InventorsCuong Ly, Ralf Weimann
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Abstract
A color photographic silver halide material having a support and at least one light-sensitive silver halide emulsion layer, the silver halide of which consists of at least 95 mole % of AgCl, and which contains a magenta coupler of formula (I) wherein R denotes H or a group which is split off under the conditions of chromogenic development, R.sub.1 denotes alkyl, which is optionally substituted, and R.sub.2 denotes R.sub.1 or aryl, wherein the sum of all the C atoms of the R.sub.1 and R.sub.2 radicals in a coupler molecule is at least 12, and wherein the silver halide contains mercury, is distinguished by improved latent image stability.
Claims11
The color photographic silver halide material which comprises a support and at least one light-sensitive silver halide emulsion layer, the silver halide of which consists essentially of at least 95 mol % of AgCl, and which contains a magenta coupler of formula (I) ##STR7## wherein R denotes H or a group which is split off under the conditions of chromogenic development,
- R.sub.1 denotes alkyl, which is optionally substituted, and
- R.sub.2 denotes R.sub.1 or aryl,
- wherein the sum of all the C atoms of the R.sub.1 and R.sub.2 radicals in a coupler molecule is at least 12, and the silver halide is doped with mercury.
A process to produce a colored photographic silver halide material which comprises doping at least one silver halide emulsion layer with mercury, wherein the silver halide of the silver halide emulsion layer consists essentially of at least 95 mol % of AgCl, and which contains a magenta coupler of formula (I) ##STR8## wherein R denotes H or a group which is split off under the conditions of chromogenic development,
- R.sub.1 denotes alkyl, which is optionally substituted, and
- R.sub.2 denotes R.sub.1 or aryl,
- wherein the sum of all the C atoms of the R.sub.1 and R.sub.2 radicals in the coupler molecule is at least 12.
Dependencies are inferred from the claim text.