Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing
Patent
1997-07-15
1999-07-13
Chea, Thorl
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Silver compound sensitizer containing
430600, 430603, 430613, 430965, G03C 134, G03C 135
Patent
active
059225270
ABSTRACT:
A black-and-white, negative-acting, silver halide emulsion is described which gives improved image tone when used in a photographic element. The toning agents are based on dithio-substituted compounds having the following general structures: ##STR1## where R.sub.1 and R.sub.2, independently, are selected from the group consisting of alkyl, aryl and heterocyclic groups, or R.sub.1 and R.sub.2 together complete a ring;
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Barlow Charles G.
Beck A. L.
Mott Andrew
Nairne Robert J. D.
Ollmann Richard R.
Chea Thorl
Imation Corp.
Weimer William K.
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