176283 ⎘
Photosensitive materials; Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives; Sensitivity-increasing substances; Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising Disulfide or dichalcogenide compound