Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product – Process using lithographic infectious developer
Patent
1994-05-24
1996-02-27
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Silver halide colloid tanning process, composition, or product
Process using lithographic infectious developer
430264, G03C 106
Patent
active
054947766
ABSTRACT:
The present invention provides a photographic element developed in the presence of a hydrazide which displays high contrast but low levels of pepper fog. The novel silver halide photographic elements comprise, in at least one layer of the element, a pepper reducing agent. The pepper reducing agent of this invention is a compound having at least one nitrogen containing, heterocyclic ring group and at least one carbonyl group in or attached to said ring. The pepper reducing agents preferably are selected from the group containing 2,5-piperazinediones; glycol urils; 2,3-pyrazinedicarboxamides; 3-iminoisoindolinones; or glutarimides.
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Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Moeller Zerull Susan
Wright Lee C.
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