Patent ID: 6242170
Filing Date: 2001-06-05
Classification: G03C,Y10S

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 emulsion layers comprises tabular grains and contains a one equivalent image dye-forming coupler and a fragmentable electron donating compound of the formula: X--Y' or a compound which contains a moiety of the formula --X--Y'; 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; and2) the oxidized form of X--Y' undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y'; and, optionally,3) the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7 V (that is, equal to or more negative than about -0.7 V).