# US 5,346,810 A · Silver halide photographic material > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,346,810 A - Document ID: US5346810A - Status: Granted - Kind: A - Application number: 08/003,476 - Filed: 1993-01-12 - Granted: 1994-09-13 - Earliest claimed: 1992-01-20 - Assignees: Fuji Photo Film Co., Ltd. - Inventors: Shigeru Ohno - Web page: https://patentgrep.com/patent/US5346810A ## CPC - G03C 1/832: {Methine or polymethine dyes} - G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G) ## Abstract Disclosed is a silver halide photographic material having a hydrophilic colloid layer which contains a dispersion of solid fine grains of an oxonole dye which does not have any dissociating proton-containing substituent or salt thereof capable of dissolving the dye during development, except the enolic proton constituting a part of the chromophoric group of the dye in the compound. In the photographic material, the oxonole dye colors only the specific hydrophilic layer without having any bad effect on the photographic properties of the material. The dye may be rapidly decolored by development of the material. ## Claims ### Claim 1 A silver halide photographic element comprising a support having thereon a hydrophilic colloid layer which contains a dispersion of solid fine grains having a mean grain size from 0.005 .mu.m to 10 .mu.m of a compound of formula (I) which is present in the amount of 0.5 to 1,000 mg/m.sup.2 : A.sub.1 =(L.sub.1 -L.sub.2).sub.m =L.sub.3 -(L.sub.4 =L.sub.5).sub.n -A.sub.2 (I) wherein A.sub.1 and A.sub.2 each represents an acidic nucleus necessary for forming an oxonole dye, excepting the case where A.sub.1 and A.sub.2 are both 2-pyrazolin-5-one nuclei, the case where they are both barbituric acid nuclei, and the case where they are both 2,6(1H,3H)-pyridinedione nuclei, and wherein at least one of the acidic nuclei represented by A.sub.1 and A.sub.2 is selected from the group consisting of a pyrazolo[3,4-b]pyridine-3,6-dione nucleus, 2(5H)-furanone nucleus, ##STR18## wherein R.sub.5, R.sub.6 and R.sub.7 each represents a hydrogen atom or a substituent; provided that R.sub.5 and R.sub.6 may be bonded to each other to form a 5-membered or 6-membered ring; L.sub.1, L.sub.2, L.sub.3, L.sub.4 and L.sub.5 each represents a methine group; and m and n each represents 0, 1 or 2; provided that the compound does not have any dissociating proton-containing substituent or salt thereof capable of dissolving the compound during development, except for the enolic proton constituting a part of the chromophoric group of an oxonole dye. ### Claim 2 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the acidic nucleus represented by A.sub.1 or A.sub.2 is a cyclic ketomethylene compound residue or a ketomethylene compound residue substituted by electron-attracting groups. ### Claim 3 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 and A.sub.2 is a pyrazolo [3,4-b]pyridine-3,6-dione nucleus or a 2(5H)-furanone nucleus. ### Claim 4 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the fine grains are present in a hydrophilic colloid layer. ### Claim 5 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the fine grains are present in an interlayer, a protective layer, an anti-halation layer, a filter layer, or a subbing layer. ### Claim 6 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the dissociating proton-containing substituent or salt thereof is a sulfonic acid group, a phosphoric acid group, a carboxylic acid group, a sulfonamido group having from 1 to 10 carbon atoms, an arylsulfamoyl group having from 6 to 10 carbon atoms, an acylsulfamoyl group having from 1 to 10 carbon atoms, a sulfonylcarbamoyl group having from 2 to 11 carbon atoms, or a salt thereof. ### Claim 7 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the solid fine grains of the compound of formula (I) have a mean grain size from 0.01 to 0.5 .mu.m. ### Claim 8 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein the solid fine grains of the compound of formula (I) are present in the amount of 1 to 500 mg/m.sup.2. ### Claim 9 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or A.sub.2 is a pyrazolo[3,4-b]pyridine-3,6-dione nucleus. ### Claim 10 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or A.sub.2 is a 2(5H)-furanone nucleus. ### Claim 11 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or ##STR19## ### Claim 12 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by ##STR20## ### Claim 13 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or ##STR21## ### Claim 14 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by ##STR22## ### Claim 15 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or ##STR23## ### Claim 16 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by A.sub.1 or ##STR24## ### Claim 17 (depends on 1) The silver halide photographic element as claimed in claim 1, wherein at least one of the acidic nuclei represented by ##STR25##