Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Two or more radiation-sensitive layers containing other than...
Patent
1998-07-24
2000-05-09
Letscher, Geraldine
Radiation imagery chemistry: process, composition, or product th
Radiation sensitive product
Two or more radiation-sensitive layers containing other than...
430506, 430955, 430956, 430957, 430958, 430959, 430544, G03C 146
Patent
active
060602279
ABSTRACT:
A color negative film having a support, at least one blue-sensitive, yellow-coupling silver halide emulsion layer, at least one green-sensitive, magenta-coupling silver halide emulsion layer and at least one red-sensitive, cyan-coupling silver halide emulsion layer, wherein at least one of the color-sensitive silver halide emulsion layers consists of at least two sub-layers of differing photographic sensitivity, the coupler application rate in the most highly sensitive layer of the color sensitive silver halide emulsion layer, of which there is at least one, consisting of at least two sub-layers of differing photographic sensitivity, is no more than 0.05 mmol/m.sup.2 and a development-promoting compound or a compound from the range of ETAR couplers and ACR couplers is used in the same or an adjacent layer, which compound, on reaction with the developer oxidation product (DOP), releases a development-promoting compound from the range of electron transfer agents (ETAR) or of binding groups having an affinity for silver (ACR), is distinguished by an improved grain/sensitivity ratio.
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Bell Peter
Borst Hans-Ulrich
Buscher Ralf
Rosenhahn Lothar
Siegel Jorg
Agfa-Gevaert NV
Letscher Geraldine
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