Patent ID: 6632596
Filing Date: 2003-10-14
Classification: G03C

Abstract:
A silver halide emulsion comprising silver halide grains, wherein the silver halide grains each have a chloride content of not less than 90 mol % and are internally doped with an iridium compound (A) and a compound (B) forming a stronger electron trap than said iridium compound (A), the silver halide grains meeting the following requirement:10<1000 and 0wherein X represents an average number of molecules of said iridium compound (A) contained per grain and Y represents an average number of molecules of said compound (B) contained per grain, and wherein said compound (B) is doped in an interior region which is the same as or internal to an interior region doped with said compound (A) and the silver halide grains each have at least a region doped with said iridium compound (A) alone, a region doped with said compound (B) alone and a region doped with neither said iridium compound (A) nor said compound (B) within the grain, and each of the region doped with said iridium compound (A) and the region doped with said compound (B) accounting for a least 10% by volume of the grain.