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Abstract

A multicolor photographic element comprising a support bearing a cyan dye image-forming unit comprising at least one red-sensitive silver halide emulsion layer having associated therewith at least one cyan dye-forming coupler, a magenta dye image-forming unit comprising at least one green-sensitive silver halide emulsion layer having associated therewith at least one magenta dye-forming coupler, a yellow dye image-forming unit comprising at least one blue-sensitive silver halide emulsion layer having associated therewith at least one yellow dye-forming coupler, wherein at least one of said silver halide emulsion layers contains a tabular grain silver halide emulsion having a halide content of at least 95% bromide and less than about 5% iodide, said iodide being substantially uniformly distributed in the silver halide grains of said emulsion, and said emulsion is sensitized with a fragmentable electron donor of the formula X--Y' or an electron donor which contains an --XY' moiety; wherein X is an electron donor moiety, Y' is a leaving proton H or a leaving group Y, with the proviso that if Y' is a proton, a base, .beta..sup.-, is covalently linked directly or indirectly to X, and wherein: 1) X--Y' has an oxidation potential between 0 and about 1.4 V; and 2) the oxidized form of X--Y' fragments to give the radical X* and the leaving fragment Y'; and, optionally, 3) the radical X* has an oxidation potential <-0.7V.

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First Claim