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US 4,046,572 AGranted
Silver halide photographic light sensitive material
AssigneeFuji Photo Film Co., Ltd.
InventorsMasanao Hinata, Yuji Mihara, Akira Sato, Tadashi Ikeda
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AssigneeFuji Photo Film Co., Ltd.
InventorsMasanao Hinata, Yuji Mihara, Akira Sato, Tadashi Ikeda
Estimating the term…
An improved silver halide photographic light-sensitive material comprising a support having coated thereon at least one photographic emulsion layer containing a dicarbocyanine dye having two heterocyclic nuclei which are 5- or 6-membered nitrogen-containing nuclei and which are connected to each other at the carbon atom in the 2- or 4-position thereof through a pentamethine chain, which can be substituted in the meso-position, a nitrogen atom of one nitrogen-containing heterocyclic nucleus of said carbocyanine dye being substituted by a sulfo- or carboxy-containing alkyl group, and a nitrogen atom of the other nitrogen-containing heterocyclic nucleus being substituted by an aralkyl group or an aryloxyalkyl group, with the proviso that said aralkyl and aryloxyalkyl groups are not substituted by a sulfo group or a carboxyl group.
A silver halide photographic light-sensitive material comprising a support having coated thereon at least one photographic emulsion layer containing a dicarbocyanine dye represented by general formula (I):
A method of preventing diffusion sensitization and spectral sensitivity from lowering with the passage of time which comprises incorporating into at least one photographic emulsion layer of a silver halide photographic light-sensitive material a dicarbocyanine dye represented by general formula (I):
Dependencies are inferred from the claim text.