Radiation imagery chemistry: process – composition – or product th – Color imaging process – Using identified radiation sensitive composition in the...
Patent
1979-09-10
1981-04-28
Downey, Mary F.
Radiation imagery chemistry: process, composition, or product th
Color imaging process
Using identified radiation sensitive composition in the...
430357, 430376, 430442, 430467, 430484, 430490, 430491, 25217416, 252180, 252DIG11, G03C 530, G03C 716, C02F 510, C11D 1700
Patent
active
042647169
ABSTRACT:
Photographic color developer compositions containing a primary aromatic amino color developing agent and an hydroxylamine are stabilized by incorporating therein a combination of sequestering agents, one of which is an aminopolyphosphonic acid compound and another of which is an aromatic polyhydroxy compound. 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 this combination of sequestering agents. Undesirable precipitate formation is also effectively avoided.
REFERENCES:
patent: Re30064 (1979-08-01), Shimamura et al.
patent: 2875049 (1959-02-01), Kridel
patent: 3201246 (1965-08-01), Allen et al.
patent: 3462269 (1969-08-01), Tassone
patent: 3746544 (1973-07-01), Heilmann
patent: 3994730 (1976-11-01), Frank
patent: 4083723 (1978-04-01), Shimamura et al.
patent: 4142895 (1979-03-01), Frank et al.
Research Disclosure, vol. 134, Item 13410, Jun. 1975. _
Research Disclosure, vol. 135, Item 13524, Jul. 1975. _
Research Disclosure, vol. 170, Item 17048, Jun. 1978. _
Purol Michael D.
Vincent Sheridan E.
Downey Mary F.
Eastman Kodak Company
Lorenzo A. P.
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