Radiation imagery chemistry: process – composition – or product th – Transfer procedure between image and image layer – image... – Diffusion transfer process – element – or identified image...
Patent
1983-02-28
1984-12-04
Schilling, Richard L.
Radiation imagery chemistry: process, composition, or product th
Transfer procedure between image and image layer, image...
Diffusion transfer process, element, or identified image...
430487, G03C 554, G03C 700, G03C 140
Patent
active
044865287
ABSTRACT:
A color diffusion transfer photographic element which comprises (a) a light-sensitive element containing at least one light-sensitive silver halide emulsion layer associated with a dye releasing redox compound, (b) a dye image receiving element and (c) an alkaline processing composition element, wherein the improvement comprises said alkaline processing composition element containing (1) a developing agent having one-electron oxidation reduction potential in the range of from -80 mV to -200 mV with respect to a saturated calomel electrode at a pH of 11.0 and (2) at least one compound selected from the group consisting of compounds represented by following general formula (I) or (II) ##STR1## wherein A and B each represents a non-metallic atomic group necessary to form a 5-, 6- or 7-membered ring; R.sub.1, R.sub.3 and R.sub.4 each represents an alkyl group, a substituted alkyl group, an alkenyl group, an aryl group or a substituted aryl group, R.sub.1 may further represent ##STR2## and R.sub.4 may further represent ##STR3## wherein Y represents a divalent group; R.sub.2 represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, an alkoxy group, and aryloxy group, an alkylthio group or an arylthio group, with the proviso that R.sub.2 is not a methyl group when the compound represented by general formula (I) is a pyridinium salt; and X.sup..crclbar. represents an anion, with the proviso that X.sup..crclbar. is not present when an inner salt is formed, wherein R.sub.3 may further connect with the ring formed with B to form a biscyclo ring system.
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Morigaki Masakazu
Tsubota Motohiko
Fuji Photo Film Co. , Ltd.
Schilling Richard L.
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