Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1992-07-22
1994-10-11
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430418, 430428, 430430, 430460, 430461, 430943, G03C 700, G03C 544, G03C 518, G03C 538
Patent
active
053546474
ABSTRACT:
The invention provides a bleach fix agent comprising a dilute solution of an alkaline metal or ammonium thiosulphite or a mixture thereof and iron (III) EDTA together with a soluble sulphite. The invention is characterized in that the soluble sulphite is present in an excess of the amount required for stabilization whereby the sulphite can be sacrificially destroyed by oxidizing agents in use thereby to neutralize the oxidizing effects upon the thiosulphate. The invention is particularly suitable for "RX" processes and results in the possibility of eliminating the stop-bath without allowing staining of the photographic material to occur.
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patent: 4769313 (1988-09-01), Fujimoto et al.
patent: 5139929 (1992-08-01), Ishibawa et al.
patent: 5244778 (1993-09-01), Fyson
Derwent's Abstract, No. 89-163 826/22, SU 1 439 523, publ. week 8922.
Bowers Jr. Charles L.
Eastman Kodak Company
Pasterczyk J.
Roberts Sarah Meeks
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