Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1984-03-30
1984-11-13
Downey, Mary F.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430376, 430467, 430490, 430491, G03C 530
Patent
active
044826265
ABSTRACT:
Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein certain polyamino stabilizing agents, such as N,N'-bis(2-hydroxybenzyl)ethylenediamine-N,N'-diacetic acid. Decomposition of the hydroxylamine, in the presence of heavy metals such as iron which act to catalyze the decomposition, and resultant formation of ammonia is effectively prevented by the presence in the developer composition of such stabilizing agents. Undesirable precipitate formation is also effectively avoided.
REFERENCES:
patent: 2875049 (1959-02-01), Kridel
patent: 3462269 (1969-08-01), Tassone
patent: 3716361, 430
patent: 4264716 (1981-04-01), Vincent et al.
"Sequestrants and Hydroxylamine Stability" by P. J. Twist, 1982 International Congress of Photographic Science, Cambridge, U.K., Sep. 6-10, 1982.
Bailey Joseph
Briggs Stuart P.
Mijovic Miroslav V.
Southby David T.
Twist Peter J.
Downey Mary F.
Eastman Kodak Company
Lorenzo Alfred P.
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