Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1995-09-08
1996-11-05
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430507, 430511, 430600, 430601, 430603, 430610, 430613, 430614, 430615, G03C 146
Patent
active
055716644
ABSTRACT:
A negatively developing color photographic silver halide material containing at least two blue-sensitive, yellow-coupling silver halide emulsion layers, at least two green-sensitive, magenta-coupling silver halide emulsion layers, at least two red-sensitive, cyan-coupling silver halide emulsion layers and a yellow filter layer on a transparent support, the layers of the same spectral sensitivity having different photographic sensitivities and the blue-sensitive layers being arranged further from the support than the yellow filter layer and the green-sensitive and red-sensitive layers being arranged nearer the support than the yellow filter layer, is distinguished by improved development kinetics if at least one of the green-sensitive layers of highest sensitivity and the red-sensitive layers of highest sensitivity contains a crown ether.
REFERENCES:
patent: 4752560 (1988-06-01), Benard et al.
patent: 4865965 (1989-09-01), Friour et al.
patent: 5246828 (1993-09-01), Okuyama et al.
patent: 5393655 (1995-02-01), Sasaki et al.
Technical Photograph Handbook, pp. 522-523, Carona Publishing Co., Ltd., 1987.
Borst Hans-Ulrich
Hankofer Peter
Siegel J org
Agfa-Gevaert AG
Letscher Geraldine
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