US3615643A - Direct positive silver halide emulsion containing a dye with at least one naptho (2 3 ) oxazole nucleus - Google Patents
Direct positive silver halide emulsion containing a dye with at least one naptho (2 3 ) oxazole nucleus Download PDFInfo
- Publication number
- US3615643A US3615643A US1488A US3615643DA US3615643A US 3615643 A US3615643 A US 3615643A US 1488 A US1488 A US 1488A US 3615643D A US3615643D A US 3615643DA US 3615643 A US3615643 A US 3615643A
- Authority
- US
- United States
- Prior art keywords
- dye
- silver halide
- emulsion
- direct positive
- positive silver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000839 emulsion Substances 0.000 title claims abstract description 53
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 32
- 239000004332 silver Substances 0.000 title claims abstract description 32
- -1 silver halide Chemical class 0.000 title claims abstract description 32
- 150000002916 oxazoles Chemical class 0.000 title claims description 9
- IOJUPLGTWVMSFF-UHFFFAOYSA-N benzothiazole Chemical class C1=CC=C2SC=NC2=C1 IOJUPLGTWVMSFF-UHFFFAOYSA-N 0.000 claims description 5
- 125000000623 heterocyclic group Chemical group 0.000 claims description 5
- AIGNCQCMONAWOL-UHFFFAOYSA-N 1,3-benzoselenazole Chemical class C1=CC=C2[se]C=NC2=C1 AIGNCQCMONAWOL-UHFFFAOYSA-N 0.000 claims description 3
- 150000000183 1,3-benzoxazoles Chemical class 0.000 claims description 3
- 229940111121 antirheumatic drug quinolines Drugs 0.000 claims description 3
- WMUIZUWOEIQJEH-UHFFFAOYSA-N benzo[e][1,3]benzoxazole Chemical class C1=CC=C2C(N=CO3)=C3C=CC2=C1 WMUIZUWOEIQJEH-UHFFFAOYSA-N 0.000 claims description 3
- 150000003222 pyridines Chemical class 0.000 claims description 3
- 150000003248 quinolines Chemical class 0.000 claims description 3
- 150000003557 thiazoles Chemical class 0.000 claims description 3
- 150000003549 thiazolines Chemical class 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 150000007513 acids Chemical class 0.000 claims description 2
- AMTXUWGBSGZXCJ-UHFFFAOYSA-N benzo[e][1,3]benzoselenazole Chemical class C1=CC=C2C(N=C[se]3)=C3C=CC2=C1 AMTXUWGBSGZXCJ-UHFFFAOYSA-N 0.000 claims description 2
- KXNQKOAQSGJCQU-UHFFFAOYSA-N benzo[e][1,3]benzothiazole Chemical class C1=CC=C2C(N=CS3)=C3C=CC2=C1 KXNQKOAQSGJCQU-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 150000002918 oxazolines Chemical class 0.000 claims description 2
- 239000000975 dye Substances 0.000 description 46
- 230000001235 sensitizing effect Effects 0.000 description 17
- 230000035945 sensitivity Effects 0.000 description 15
- 239000000463 material Substances 0.000 description 6
- 230000003595 spectral effect Effects 0.000 description 5
- QGKMIGUHVLGJBR-UHFFFAOYSA-M (4z)-1-(3-methylbutyl)-4-[[1-(3-methylbutyl)quinolin-1-ium-4-yl]methylidene]quinoline;iodide Chemical compound [I-].C12=CC=CC=C2N(CCC(C)C)C=CC1=CC1=CC=[N+](CCC(C)C)C2=CC=CC=C12 QGKMIGUHVLGJBR-UHFFFAOYSA-M 0.000 description 4
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 4
- XCFIVNQHHFZRNR-UHFFFAOYSA-N [Ag].Cl[IH]Br Chemical compound [Ag].Cl[IH]Br XCFIVNQHHFZRNR-UHFFFAOYSA-N 0.000 description 4
- 125000000217 alkyl group Chemical group 0.000 description 4
- 125000003710 aryl alkyl group Chemical group 0.000 description 4
- 229910052740 iodine Inorganic materials 0.000 description 4
- 125000001434 methanylylidene group Chemical group [H]C#[*] 0.000 description 4
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 239000011630 iodine Substances 0.000 description 3
- DZVCFNFOPIZQKX-LTHRDKTGSA-M merocyanine Chemical compound [Na+].O=C1N(CCCC)C(=O)N(CCCC)C(=O)C1=C\C=C\C=C/1N(CCCS([O-])(=O)=O)C2=CC=CC=C2O\1 DZVCFNFOPIZQKX-LTHRDKTGSA-M 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- GVNVAWHJIKLAGL-UHFFFAOYSA-N 2-(cyclohexen-1-yl)cyclohexan-1-one Chemical compound O=C1CCCCC1C1=CCCCC1 GVNVAWHJIKLAGL-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- 101150065749 Churc1 gene Proteins 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical class C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 description 2
- 102100038239 Protein Churchill Human genes 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 2
- HOLVRJRSWZOAJU-UHFFFAOYSA-N [Ag].ICl Chemical compound [Ag].ICl HOLVRJRSWZOAJU-UHFFFAOYSA-N 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 2
- 229910052794 bromium Inorganic materials 0.000 description 2
- 125000004181 carboxyalkyl group Chemical group 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000001804 emulsifying effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005070 ripening Effects 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- TXUICONDJPYNPY-UHFFFAOYSA-N (1,10,13-trimethyl-3-oxo-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-17-yl) heptanoate Chemical compound C1CC2CC(=O)C=C(C)C2(C)C2C1C1CCC(OC(=O)CCCCCC)C1(C)CC2 TXUICONDJPYNPY-UHFFFAOYSA-N 0.000 description 1
- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- UGWULZWUXSCWPX-UHFFFAOYSA-N 2-sulfanylideneimidazolidin-4-one Chemical compound O=C1CNC(=S)N1 UGWULZWUXSCWPX-UHFFFAOYSA-N 0.000 description 1
- RYYXDZDBXNUPOG-UHFFFAOYSA-N 4,5,6,7-tetrahydro-1,3-benzothiazole-2,6-diamine;dihydrochloride Chemical compound Cl.Cl.C1C(N)CCC2=C1SC(N)=N2 RYYXDZDBXNUPOG-UHFFFAOYSA-N 0.000 description 1
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 description 1
- 125000002373 5 membered heterocyclic group Chemical group 0.000 description 1
- 125000004070 6 membered heterocyclic group Chemical group 0.000 description 1
- 229910014033 C-OH Inorganic materials 0.000 description 1
- 229910014570 C—OH Inorganic materials 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 229910021626 Tin(II) chloride Inorganic materials 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 125000004183 alkoxy alkyl group Chemical group 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 229910001864 baryta Inorganic materials 0.000 description 1
- KZCMZPDROXCRGA-UHFFFAOYSA-N benzo[e][1,2]benzoxazole Chemical class C1=CC=CC2=C3C=NOC3=CC=C21 KZCMZPDROXCRGA-UHFFFAOYSA-N 0.000 description 1
- BVVBQOJNXLFIIG-UHFFFAOYSA-N benzo[g][1,3]benzoxazole Chemical compound C1=CC=CC2=C(OC=N3)C3=CC=C21 BVVBQOJNXLFIIG-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- LIAWOTKNAVAKCX-UHFFFAOYSA-N hydrazine;dihydrochloride Chemical compound Cl.Cl.NN LIAWOTKNAVAKCX-UHFFFAOYSA-N 0.000 description 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000001119 stannous chloride Substances 0.000 description 1
- 235000011150 stannous chloride Nutrition 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/485—Direct positive emulsions
- G03C1/48515—Direct positive emulsions prefogged
- G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
- G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes
Definitions
- R and R which may be the same or different, each represents an alkyl group, an alkoxyalkyl group. a hydroxyalkyl group, a carboxyalkyl group, a sulphoalkyl group. an ally] group, an aralkyl group. or a substituted aralkyl group, L is a methine chain or a methine chain substituted by alkyl or aryl groups; 2 is an atomic group necessary to complete a 5- or 6-membered nitrogen containing heterocyclic nucleus; Q is an atomic group necessary to complete a 5- or 6- membered heterocyclic nucleus; m and p are individually (l. lor2; Xis ananionandn isOor I.
- This invention relates to a silver halide photographic emulsion and, more particularly, a fogged direct positive photo graphic emulsion.
- the overall sensitivity of a direct positive photographic emulsion is markedly raised by increasing the amount of sensitizing dye added thereto but, in many cases, the maximum density (D/max) and contrast are thereby decreased, often resulting in insufficient images.
- This re-reversal depends on the method of preparation of a silver halide emulsion and more remarkably on the variety of sensitizing dye added. Accordingly, a sensitizing dye causing a large "re-reversal cannot be put to practical use as it is.
- Q is an atomic group necessary to complete a fivemembered or six-membered heterocyclic nucleus, for example, rhodanines, oxazolido-S-on-Z-thiones, thiohydantoins, pyrazole-S-ones and tltiobarbituric acids, m and p are 0, l or 2.1: is an anion and n isO or 1.
- FIG. I represents the characteristic curve of a photographic emulsion undergoing the re-reversal" phenomenon.
- FIG. 2 represents the characteristic curves of photographic material containing no sensitizing dye, a conventional dye and the sensitizing dye of the present invention, respectively.
- sensitizing dyes represented by the general formulas (I) or (II) are given below, and are merely illustrative, and not limiting, in nature.
- Comparison Dye B Comparison Dye F Hi jlHu Cl a Dye 13 55 Comparison Dye G Comparison Dye A 70 on,
- Comparison Dye K It has already been disclosed in Japanese Patent publication No. 4l25/l968, US. Pat. No. 2,323,187 and French Patent No. l,520,822 that sensitizing cyanine dyes and merocyanine dyes are suitable for use to raise the spectral sensitivity of a direct positive silver halide photographic emulsion.
- the photographic characteristics of reversal that is, spectral sensitivity, contrast, minimum density and re-reversal, differ with the variety of sensitizing dyes. This is unlike the spectral sensitization of the ordinary nonfogged emulsion. It is found that these photographic characteristics differ remarkably depend ing on the difference of structure, i.e., heterocyclic ring, or a sensitizing dye.
- a direct positive silver halide photographic emulsion sensitized with a dye having at least one naphtho (2,3d) oxazole nucleus represented by the general formula (I) or (ll) has more excellent characteristics, such as higher sensitivity, less re-reversal and lower minimum density than an emulsion sensitized with a dye having no naphtho (2,3 d) oxazole nucleus, for example, benzoxazole, benzothiazole, naphtho (2,1 d) oxazole or naphtho (l,2) oxazole nucleus.
- a high-sensitive direct positive silver halide photographic emulsion can be obtained by incorporating a sensitizing dye represented by the general formula (l) or (II) into a direct positive silver halide photographic emulsion.
- the thus-sensitized emulsion is particularly suitable for use in the copying of documents.
- a dye of the general formula (l) or (ll) is added to an emulsion in the form of a solution in a suitable solvent such as water, methanol or ethanol.
- the amount of the dye to be added to a direct positive silver halide emulsion is substantially the same as in ordinary silver halide nonfogged emulsions, i.e., 0.5$0 mg. per kg. of the emulsion.
- One or more of the dyes may be used.
- Silver salts such as silver chloride, silver bromide, silver chlorobromide, silver chloroiodide, silver iodobromide and silver chloroiodobromide may be used as the emulsion in the present invention.
- the emulsifying and physical ripening of the silver halide emulsion used in the present invention are carried out in a manner similar to that employed for ordinary emulsions but, before emulsifying or during the physical ripening, a salt of a Group VIII metal, such as iridium or rhodium, may be added thereto.
- a salt of a Group VIII metal such as iridium or rhodium
- the silver halide emulsion used in the present invention is fogged to its maximum density by light or by adding a chemical fogging agent thereto. Such a chemical fogging agent must fog the silver halide without attacking it. Ordinarily, thiourea dioxide, stannous chloride, formaldehyde, or hydrazine may be used.
- the pH and pAg are controlled, as the occasion demands, and a solution of the dye of the present invention is then added to the emulsion with sufficient agitation and thencoated onto a support.
- Ordinary additives such as coating aids and hardeners may be added to the emulsion.
- the following may be employed as the support: glass, a cellulose derivative film, a synthetic resin film or baryta paper.
- the developed material was fixed with an ordinary sodium thiosulfate-containing fixing solution, washed with water and dried. Measurement of the optical density was carried out by means of a densitometer. The results are shown in table 1.
- the sensitivity is represented by a relative value of the reciprocal of the amount of exposure required for giving a density of from one to times the sensitivity of an emulsion to which no sensitizing dye is added.
- a silver chloroiodobromide emulsion (iodine 1.0 mol. percent, bromine 30 mol percent) was fogged with hydrazine 3.
- the resulting photographic n.2 thi lhiohydantoings .5 d hi b material was exposed through a step wedge by means of a senbim ig a id sitometer.
- the material after exposure wasdeveloped at 4.
- a photographic element comprising a support having C. for 2 minutes with the following developer.
- the developer thereon at least one layer of the fogged direct positive silver was used within 6 hours after preparation. halide emulsion of claim I.
- curves 2, 3 and 4 are the characteristic curves of CH; CH; a.,c and b in table 3, respectively.
- What is claimed is: l.
- L is a methine chain or a methine chain substituted by alkyl or aryl groups
- Z is an atomic group necessary to complete a fiveor six-membered nitrogen containing heterocyclic nucleus
- Q is an atomic group necessary to complete a fiveor six-mem- .bered heterocyclic nucleus
- m and p are individually 0, l or 2;
- X is an anion and n isO or I.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Plural Heterocyclic Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP44001555A JPS4810644B1 (enrdf_load_stackoverflow) | 1969-01-08 | 1969-01-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3615643A true US3615643A (en) | 1971-10-26 |
Family
ID=11504755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1488A Expired - Lifetime US3615643A (en) | 1969-01-08 | 1970-01-08 | Direct positive silver halide emulsion containing a dye with at least one naptho (2 3 ) oxazole nucleus |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US3615643A (enrdf_load_stackoverflow) |
| JP (1) | JPS4810644B1 (enrdf_load_stackoverflow) |
| DE (1) | DE2000587B2 (enrdf_load_stackoverflow) |
| FR (1) | FR2027921A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1286044A (enrdf_load_stackoverflow) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970461A (en) * | 1970-10-01 | 1976-07-20 | Fuji Photo Film Co., Ltd. | Fogged, direct-positive silver halide emulsion containing carbocyanine dye having indolenine nucleus |
| US4081281A (en) * | 1972-02-18 | 1978-03-28 | Agfa-Gevaert N.V. | Developing low fogged, direct-positive silver halide emulsion with an energetic developer free from halide ions |
| US5418124A (en) * | 1992-03-19 | 1995-05-23 | Fuji Photo Film Co. Ltd. | Silver halide photographic emulsion and a photographic light-sensitive material |
| EP1750173A1 (en) | 2005-08-04 | 2007-02-07 | Fuji Photo Film Co., Ltd. | Silver halide photosensitive material and packaged body containing the same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52102337U (enrdf_load_stackoverflow) * | 1976-01-28 | 1977-08-03 |
-
1969
- 1969-01-08 JP JP44001555A patent/JPS4810644B1/ja active Pending
-
1970
- 1970-01-07 FR FR7000378A patent/FR2027921A1/fr not_active Withdrawn
- 1970-01-08 DE DE19702000587 patent/DE2000587B2/de active Granted
- 1970-01-08 US US1488A patent/US3615643A/en not_active Expired - Lifetime
- 1970-01-08 GB GB991/70A patent/GB1286044A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970461A (en) * | 1970-10-01 | 1976-07-20 | Fuji Photo Film Co., Ltd. | Fogged, direct-positive silver halide emulsion containing carbocyanine dye having indolenine nucleus |
| US4081281A (en) * | 1972-02-18 | 1978-03-28 | Agfa-Gevaert N.V. | Developing low fogged, direct-positive silver halide emulsion with an energetic developer free from halide ions |
| US5418124A (en) * | 1992-03-19 | 1995-05-23 | Fuji Photo Film Co. Ltd. | Silver halide photographic emulsion and a photographic light-sensitive material |
| EP1750173A1 (en) | 2005-08-04 | 2007-02-07 | Fuji Photo Film Co., Ltd. | Silver halide photosensitive material and packaged body containing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2000587B2 (de) | 1973-03-29 |
| JPS4810644B1 (enrdf_load_stackoverflow) | 1973-04-05 |
| FR2027921A1 (enrdf_load_stackoverflow) | 1970-10-02 |
| GB1286044A (en) | 1972-08-16 |
| DE2000587C3 (enrdf_load_stackoverflow) | 1973-10-11 |
| DE2000587A1 (de) | 1970-07-23 |
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