Radiation imagery chemistry: process – composition – or product th – Silver halide colloid tanning process – composition – or product
Patent
1983-08-04
1985-03-12
Downey, Mary F.
Radiation imagery chemistry: process, composition, or product th
Silver halide colloid tanning process, composition, or product
430302, 430306, 430539, 430566, 430961, G03C 106, G03F 702
Patent
active
045045720
ABSTRACT:
Silver halide photographic elements for tanning development including tanning developers, which can diffuse into the gelatin layer containing them, can be improved if they are associated with non-diffusing hydroquinones. In the case where such tanning developer is hydroquinone or a derivative thereof, said elements include such diffusing hydroquinone associated with a hydroquinone derivative non-diffusing in the gelatin layer containing it. Such non-diffusing hydroquinones preferably are hydroquinones substituted with aliphatic chains containing a total of at least twelve carbon atoms and, more preferably, are dispersed in the layer dissolved in a high-boiling organic solvent.
REFERENCES:
patent: 3364024 (1968-01-01), Yackel et al.
patent: 4299909 (1981-10-01), Imatomi et al.
patent: 4369245 (1983-01-01), Beruto et al.
patent: 4427757 (1984-01-01), Beebe et al.
Beruto Marco
Luzzi Antonio
Ramello Piero
Downey Mary F.
Litman Mark A.
Minnesota Mining and Manufacturing Company
Sell Donald M.
Smith James A.
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