Patent ID: 6696236
Filing Date: 2004-02-24
Classification: G03C

Abstract:
A silver halide emulsion containing silver halide grains, with no less than 90 mol % of said silver halide grains being silver chloride and the silver halide grains containing at least one iridium compound (A) and at least one iridium compound (B), wherein(i) the iridium compound (A) is represented by formula (I), (ii) the iridium compound (B) is represented by formula (II), and at least 50 mol % of the iridium compound (B) is present in a localized silver bromide phase where the localized silver bromide content is no less than 10 mol %, and (iii) the silver halide grains have a localized silver bromide phase where the localized silver bromide content is at least 5 mol % in a silver amount region where at least 5 mol % of total silver amount contained in the silver halide grains is present, with formulae (I) and (II) being: [Ir(Y)n(Xa)m]lâ€ƒâ€ƒFormula (I) wherein Xa is a halogen atom; Y is O or H2O; and l, m and n are integers selected from ranges of from âˆ’2 to +3, from 1 to 5 and from 1 to 5, respectively; and [Ir(Xb)6]pâ€ƒâ€ƒFormula (II) wherein Xb is a halogen atom; and p is an integer selected from a range of from âˆ’2 to âˆ’3.