Radiation imagery chemistry: process – composition – or product th – Nonradiation sensitive image processing compositions or... – Developer
Patent
1995-05-15
1996-11-26
Wright, Lee C.
Radiation imagery chemistry: process, composition, or product th
Nonradiation sensitive image processing compositions or...
Developer
430483, 430485, 430489, 430490, 430492, G03C 530
Patent
active
055784348
ABSTRACT:
The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): ##STR1## wherein, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are selected from the group consisting of hydrogen and group CH.sub.2 R.sub.5, wherein R.sub.5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl.
A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described.
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James, The Theory of the Photographic Process, 4th Ed. 1977, pp. 476-478.
Marchesano Carlo
Moizo Elda
Mott Andrew
Stevenson Dian E.
Evearitt Gregory A.
Imation Corp.
Litman Mark A.
Wright Lee C.
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