Multilayer color photographic element
AssigneeEastman Kodak Company
InventorsDaniel R. English, Steven G. Link, Hans G. Ling
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Abstract
The invention provides a color negative photographic element comprising a transparent support bearing at least two light sensitive silver halide emulsion layers sensitive to blue light, at least two such layers sensitive to green light, and at least two such layers sensitive to red light, wherein at least one of the red sensitive emulsion layers is spectrally sensitized with both a particular first carbocyanine dye (I) which contains both a thiazole and an oxazole ring and a particular second carbocyanine dye (II) which contains two thiazole rings. The element of the invention is advantageous in allowing an increased efficiency of silver removal during the bleaching step of the development process.
Claims28
A color negative photographic element comprising a transparent support bearing at least two light sensitive silver halide emulsion layers sensitive to blue light, at least two such layers sensitive to green light, and at least two such layers sensitive to red light, wherein at least one of the red sensitive emulsion layers is spectrally sensitized with both of the following dyes:
- (A) a sensitizing dye of the formula (I):
- ##STR14## wherein:
- either V.sub.1 and V.sub.2 or V.sub.2 and V.sub.3 are joined to form a fused ring and the remaining member of V.sub.1, V.sub.2, and V.sub.3 is hydrogen;
- V.sub.4 and V.sub.5 are independently selected from the group consisting of hydrogen, methyl, ethyl, methoxy, ethoxy, halogen, phenyl groups, heteroaromatic 5- or 6-membered ring groups, cyano, and acetamido;
- R.sub.1 and R.sub.2 are independently 2 to 6 carbon alkyl groups at least one of which is substituted by a carboxyl or sulfonic acid anion;
- R.sub.3 is an alkyl group of 1 to 4 carbon atoms;
- X.sub.1 and X.sub.2 are either oxygen or sulfur but are not the same;
- and
- M is a counter ion to balance the charge on (I);
- and
- (B) a sensitizing dye of the formula (II):
- ##STR15## wherein V.sub.6, V.sub.7, V.sub.8 and V.sub.9 are independently any of the groups as described for V.sub.4 in formula (I);
- R.sub.4 and R.sub.5 are independently any of the groups described for R.sub.1 in formula (I);
- R.sub.6 may be any of the groups as described for R.sub.3 in formula (I);
- and
- M is a counter ion to balance the charge of (II).
Dependencies are inferred from the claim text.