This invention relates to 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 and
an electron transfer agent releasing compound represented by formula (I):
wherein:
- CAR1 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, and (optionally) a development
accelerator releasing compound represented by the formula (II):
wherein:
- CAR2 is a carrier moiety which is capable of releasing (SAM)-NX1NX2X3
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
- NX1NX2X3 is a hydrazine
group wherein X1, X2 and X3 are individually hydrogen
or a substituent chosen from alkyl, aryl, carbonyl, or sulfonyl groups with the
proviso that at least one of X1, X2 and X3 is hydrogen.
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