Patent ID: 6893809

Claim:
A negative silver halide photographic element comprising a support and a silver halide imaging layer containing a light sensitive silver halide imaging emulsion, said silver halide imaging layer further comprising a separately precipitated non-imaging intentionally fogged fine grain emulsion, an electron transfer agent releasing compound represented by formula (I) and a development accelerator releasing compound represented by formula (II): CAR 1 -(L) n -ETA (I) wherein: CAR 1 is a carrier moiety which is capable of releasing -(L)n-ETA on reaction with oxidized developing agent; L is a divalent linking group, n is 0, 1 or 2; and ETA is a releasable electron transfer agent; CAR 2 —(SAM)-NX 1 —NX 2 X 3 (II) wherein: CAR 2 is a carrier moiety which is capable of releasing —(SAM)-NX 1 —NX 2 X 3 on reaction with oxidized developing agent; SAM is a silver absorbable moiety attached to the carrier moiety and is released on reaction with oxidized development agent; and —NX 1 —NX 2 X 3 is a hydrazine group wherein X 1 , X 2 and X 3 are individually hydrogen or a substituent chosen from alkyl, aryl, carbonyl or sulfonyl groups with the proviso that at least one of X 1 , X 2 and X 3 is hydrogen.