Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1992-09-08
1998-09-01
Le, Hoa Van
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430435, 430444, 430448, G03E 142
Patent
active
058009744
ABSTRACT:
A black and white photographic element comprising as a photosensitive medium a layer of a silver halide emulsion characterised in that the photosensitive medium comprises in the same layer or in an adjacent layer thereto a developer comprising a substantially non-diffusing polymeric compound having as a component part of its structure a plurality of units having a nucleus of general formula (I): ##STR1## wherein; each Z independently is a member selected from the group consisting of --OH and a group which leaves an --OH residue when contacted with an alkali (pH .gtoreq.10) at temperatures of .ltoreq.50.degree. C.
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Research Disclosure 17364 (p. 2, lines 20-35).
J. Amer. Chem. Soc., vol. 71, pp. 403-410 (1949).
The Theory of the Photographic Process, Fourth Edition, 1977, Macmillan Publishing Co., Inc., Ch. 11, "Developing Agents and Their Reactions", p. 302.
Hall Kevin P.
Newman Stephen
Stevenson Dian Elizabeth
Wallis Julian
Imation Corp.
Le Hoa Van
Weimer William K.
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