US3660099A - Light-sensitive supersensitized silver halide photographic emulsions - Google Patents
Light-sensitive supersensitized silver halide photographic emulsions Download PDFInfo
- Publication number
- US3660099A US3660099A US831714A US3660099DA US3660099A US 3660099 A US3660099 A US 3660099A US 831714 A US831714 A US 831714A US 3660099D A US3660099D A US 3660099DA US 3660099 A US3660099 A US 3660099A
- Authority
- US
- United States
- Prior art keywords
- light
- emulsion
- silver halide
- sensitive
- color
- 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 62
- 229910052709 silver Inorganic materials 0.000 title claims abstract description 27
- 239000004332 silver Substances 0.000 title claims abstract description 27
- -1 silver halide Chemical class 0.000 title claims abstract description 26
- 239000000463 material Substances 0.000 claims description 14
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 3
- 229920000233 poly(alkylene oxides) Polymers 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 239000004094 surface-active agent Substances 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 229910000510 noble metal Inorganic materials 0.000 claims description 2
- 239000004848 polyfunctional curative Substances 0.000 claims description 2
- 229910052717 sulfur Inorganic materials 0.000 claims description 2
- 239000011593 sulfur Substances 0.000 claims description 2
- 239000000975 dye Substances 0.000 abstract description 40
- 230000001235 sensitizing effect Effects 0.000 description 30
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- 230000003595 spectral effect Effects 0.000 description 11
- 125000000217 alkyl group Chemical group 0.000 description 8
- 125000004181 carboxyalkyl group Chemical group 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 125000004964 sulfoalkyl group Chemical group 0.000 description 7
- 206010070834 Sensitisation Diseases 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 230000005070 ripening Effects 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 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 5
- 230000008313 sensitization Effects 0.000 description 5
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 5
- 125000003545 alkoxy group Chemical group 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 238000009472 formulation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 4
- ZUNKMNLKJXRCDM-UHFFFAOYSA-N silver bromoiodide Chemical compound [Ag].IBr ZUNKMNLKJXRCDM-UHFFFAOYSA-N 0.000 description 4
- 125000001424 substituent group Chemical group 0.000 description 4
- JKFYKCYQEWQPTM-UHFFFAOYSA-N 2-azaniumyl-2-(4-fluorophenyl)acetate Chemical compound OC(=O)C(N)C1=CC=C(F)C=C1 JKFYKCYQEWQPTM-UHFFFAOYSA-N 0.000 description 3
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 3
- 206010034960 Photophobia Diseases 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 229910021612 Silver iodide Inorganic materials 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 239000013068 control sample Substances 0.000 description 3
- 125000000524 functional group Chemical group 0.000 description 3
- 238000011534 incubation Methods 0.000 description 3
- 208000013469 light sensitivity Diseases 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229940045105 silver iodide Drugs 0.000 description 3
- 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 2
- 108010010803 Gelatin Proteins 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 238000004061 bleaching Methods 0.000 description 2
- DOIRQSBPFJWKBE-UHFFFAOYSA-N dibutyl phthalate Chemical compound CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 2
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 2
- 229920000159 gelatin Polymers 0.000 description 2
- 239000008273 gelatin Substances 0.000 description 2
- 235000019322 gelatine Nutrition 0.000 description 2
- 235000011852 gelatine desserts Nutrition 0.000 description 2
- 125000005843 halogen group Chemical group 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229940001482 sodium sulfite Drugs 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 238000010186 staining Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- AYLDJQABCMPYEN-UHFFFAOYSA-N (4-azaniumylphenyl)-diethylazanium;sulfate Chemical compound OS(O)(=O)=O.CCN(CC)C1=CC=C(N)C=C1 AYLDJQABCMPYEN-UHFFFAOYSA-N 0.000 description 1
- AGJZCWVTGOVGBS-UHFFFAOYSA-N 1,1'-diethyl-2,2'-cyanine Chemical compound C1=CC2=CC=CC=C2N(CC)\C1=C\C1=CC=C(C=CC=C2)C2=[N+]1CC AGJZCWVTGOVGBS-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- HOLVRJRSWZOAJU-UHFFFAOYSA-N [Ag].ICl Chemical compound [Ag].ICl HOLVRJRSWZOAJU-UHFFFAOYSA-N 0.000 description 1
- RKNPMBDQGVJSBB-UHFFFAOYSA-L [OH-].[Na+].C([O-])(O)=O.[Na+].C1(O)=CC=C(O)C=C1 Chemical compound [OH-].[Na+].C([O-])(O)=O.[Na+].C1(O)=CC=C(O)C=C1 RKNPMBDQGVJSBB-UHFFFAOYSA-L 0.000 description 1
- CPLHFNBTARAMDT-UHFFFAOYSA-L [S-]C#N.[K+].[Br-].[K+] Chemical compound [S-]C#N.[K+].[Br-].[K+] CPLHFNBTARAMDT-UHFFFAOYSA-L 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- 150000001450 anions Chemical group 0.000 description 1
- 229960004217 benzyl alcohol Drugs 0.000 description 1
- 235000019445 benzyl alcohol Nutrition 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000701 coagulant Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 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 1
- 125000001624 naphthyl group Chemical group 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- KGEYYBZJWYQIDF-UHFFFAOYSA-M sodium hydrogen carbonate sulfurous acid hydrate Chemical compound O.C([O-])(O)=O.[Na+].S(=O)(O)O KGEYYBZJWYQIDF-UHFFFAOYSA-M 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
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
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/28—Sensitivity-increasing substances together with supersensitising substances
- G03C1/29—Sensitivity-increasing substances together with supersensitising substances the supersensitising mixture being solely composed of dyes ; Combination of dyes, even if the supersensitising effect is not explicitly disclosed
Definitions
- ABSTRACT A supersensitized light-sensitive silver halide photographic emulsion is obtained by incorporating in the emulsion a combination of two specific dyes having the general formulas I and II as indicated below.
- This invention relates to light-sensitive silver halide photographic emulsions supersensitized by joint use of two or more of spectral sensitizing cyanine dyes.
- the sensitized spectral region of, for example, the red light-sensitive emulsion is preferably reduced in green light-sensitivity but increased in red light-sensitivity so that the best color reproduction may be obtained.
- a color coupler when added, it is required that no decrease in spectral sensitivity due to the reaction with said color coupler be caused.
- very few of the combinations among those known up to date satisfy the above conditions, in particular when they are added to color photographic material.
- sensitizing cyanine dye shown by the general formula [I] or [ll] as given hereinafter in conjunction or that is use of a sensitizingcyanine dye in which at least one anion radical such as carboxyalkyl group, sulfoalkyl group and a functional group derived therefrom is contained as a substituent at the heterocyclic nitrogen atom remarkably increased color sensitivity and the conditions as aforementioned were entirely satisfied.
- R,, R and R are each a lower alkyl group, hydroxyalkyl group, carboxyalkyl group, sulfoalkyl group or functional group derived therefrom with the proviso that at least one of R and R is carboxyalkyl group, sulfoalkyl group or a group derived therefrom; R and R are each a lower alkyl group;
- V is a halogen atom, a lower alkyl group or alkoxy group
- V V are each a hydrogen atom, lower alkyl group, alkoxy group, and V, and V or V;, and V may form together a benzene ring or a ring including the methylenedioxy group;
- the sensitive maximum wavelength of the light-sensitive silver halide photographic emulsion of this invention exists in the middle of sensitive maximum wavelengths of sensitizing dyes used alone, respectively. According to this invention, sensitization is possible over a broad wavelength region by varying the kind of sensitizing dyes and rate of amount to be added and therefore the most desirable sensitization is attainable in accordance with various purposes whether the sensitized emulsion is used for color photographic material or black and white photographic material. 7
- spectral sensitization of a panchromatic emulsion is possible according to this invention by increasing green light sensitivity by effecting the supersensitization with the addition of a pseudocyanine, merocyanine, oxacarbocyanine or benzimidazolocarbocyanine dye.
- Sensitizing dyes used in this invention maybe added to silver halide photographic emulsion in the form of a solution in an organic solvent readily miscible with water such as methanol etc. and at any stage of the preparation of the emulsion. In general, the addition is preferably made just after completion of the second ripening.
- the amount of sensitizing dye to be added varies according to the kind of silver halide emulsion used, and it is generally suitable that the sum of the sensitizing dyes of the general formula [I] and the general formula [II] is 30-100 mg per kg of silver halide emulsion, where the sensitizing dye of the general. formula [II] is preferably 2,-70 percent of the total.
- the above limitation-on quantity and quantitative ratio of sensitizing dye is, however, not critical but variable.
- the silver halide emulsion used in this invention may be any of silver 'iodobromide-, silver chlorobromido-, silver chloroiodide', silver bromideand silver chloride emulsions.
- These emulsions may be sensitized by a chemical sensitizer such as a noble metal-, sulfur-, reductionor polyalkylene oxide sensitizer and ordinary additives such as stabilizer, surfactant, hardening agent, etc. may be added to the emulsions.
- a hydrophilic or oleophilic cyan coupler of incorporated type which forms cyan color may be contained in the emulsions.
- EXAMPLE 1 A silver iodobromide emulsion containing 5 mol of silver iodide which has been treated with gelatin coagulant is subjected to the second ripening according to the ordinary manner. Immediately after completion of the second ripening, a 0.1 percent methanol solution of the sensitizing dyes of the general formulas [I] and [II] is added in the amount indicated in the Table I per kg of the emulsion. The emulsion thus treated is coated on a film supported and dried.
- the resulting light-sensitive photographic material is exposed to light by means of a sensitometer KS-l (manufactured and sold by'Konishiroku Photo Industry Co., Ltd.) at Lux, 5400K, and thereafter treated with the developing solution having the following formulation for 5 minutes at 20C.:
- spectral sensitivity of the supersen- 25 sitized emulsion according to this invention is remarkably int creased as compared with the case where each sensitizing dye From F above table, appareni that of is used alone.
- the emulsion can be senmzmg y accordmg to F1115 Invention effecnve for sensitized over a broad wavelength region by varying the increasing relative speed to red light even in the presence of sitizing dye used and its amount.
- the most desirable the color mcol'poratfafl f p as compared with the spectral sensitization is attainable in accordance with various comwlcombmauon ofihe sensitizing dyes and purposes whether the sensitized emulsion is used for color or Further from 'f relatlfe Speed to green llghtv black and white photographic materiap noted that the combination according to the PIESCI'lblnVfil'lIIOIl remarkably increases relative speed to red light, without the EXAMPLE 2 3 5 increase of relative speed to green light.
- Such combination of sensitizing dyes is one desirable or sensitizing red light-sensitive emulsion of color photographic material and excellent color reproduction is attainable.
- a high-speed silver iodobromide emulsion containing 5 mol of silver iodide is produced according to the neutral method.
- 0.l percent methanol solution of the sensitizing dyes of the general-formulas [l] and [II] is added to the emulsion in the amount indicated in the Table 2 per kg of the emulsion.
- a control sample is prepared by using the coupler, l-octadecyl-2-[2-( l-hydroxy)naphthyl]- sensitizing dyes of U.S..Pat. No. 2,075,048 under the same benzimidazolo-S-sulfonic acid is added in the ordinary manner conditions as above. 5 and pH is adjusted to 6.8 to give red light-sensitive color
- the sensitizing dyes used in the control sample are as folphotographic emulsion. lows: A part of the resulting emulsion is immediately coated on a (A) S film support and the other part is coated on a film support after incubation at 40 C. for 3 hours.
- a control sample is prepared by using the same control sensitizing dyes as used in Example 2 under the same condition as above. Cam The resultin sam les are then s b'ected to th ex 0 u t 1 g p u e p 5 re 0 I light and development in the same manner as in Example 2.
- red light Fog red light Fog mam'ler as Example 11 Control (A) 25 (B) 25 0.07 51 0. 07 N,N-Diethyl-p-phenylenediamine sulfate I g Do (A) 40 (B) 10 )4 0.06 46 0.07
- drous sodium sulfite carbonate (monohydrate) 82.0: g Pot ssium bromide s 0 40 (13) 10 148 0. 00 0.00
- EXAMPLE 4 A light-sensitive silver iodobromide reversal color photographic emulsion containing 3 mol of silver iodide and sensitized by goldand sulfur-sensitization is subjected to the second ripening. Immediately after completion of the second ripening, 0.1% methanol solution of the sensitizing dyes of the general formulas [l] and [ll] is added to the emulsion in the amount indicated in Table 4 per kg of the emulsion.
- the color coupler 4-chloro-l-hydroxy-Z-N-octylnaphthoamide dissolved in di-n-butyl phthalate by heating and dispersed in gelatin solution by using sodium alkylbenzenesulfonate. Thereafter, pH is adjusted to 6.8.
- the emulsion thus treated is coated on a film support and dried to give red light-sensitive reversal color photographic material.
- the control is prepared by repeating the above procedure using the control sensitizing dyes as used in Example 3.
- Example 3 The samples thus obtained are then'exposed to light in the same manner as Example 3 and treated with a first developing solution having the following formulation for 10 minutes at 20C.:
- N-Ethyl-N fi-methanesulfonamido-ethyl-3-methylaminoaniline sulfate 5.0 g Sodium sulfite (anhydrous) 2.0 g Sodium carbonate (monohydrate) 50 g Potassium bromide 1.0 g Benzylalcohol 3.8 g Sodium hydroxide 5.5 g
- a light-sensitive silver halide photographic emulsion characterized by containing at least one sensitizing cyanine dye of the general formula [I] in combination with at least one sensitizing cyanine dye of the general formula [ll]
- R R and R are each a lower alkyl group, hydroxyalkyl group, carboxyalkyl group, or sulfoalkyl group with the proviso that at least one 'of R and R is a carboxyalkyl group or sulfoalkyl group,
- R and R are each a lower alkyl group
- V is a halogen atom, lower alkyl group or alkoxy group
- V V and V are each a hydrogen atom, lower alkyl group or alkoxy group. and V and V or V,, and V may form together a benzene ring or a ring including methylenedioxy group;
- X is an anion
- n 2 or 3 and m is l or 2.
- a light-sensitive silver halide color photographic material which comprises a film support and, coated thereon, a layer of the emulsion as claimed in claim 1.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3944968 | 1968-06-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3660099A true US3660099A (en) | 1972-05-02 |
Family
ID=12553322
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US831714A Expired - Lifetime US3660099A (en) | 1968-06-10 | 1969-06-09 | Light-sensitive supersensitized silver halide photographic emulsions |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3660099A (enrdf_load_stackoverflow) |
| DE (1) | DE1929037A1 (enrdf_load_stackoverflow) |
| GB (1) | GB1230731A (enrdf_load_stackoverflow) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3819383A (en) * | 1971-07-12 | 1974-06-25 | Ilford Ltd | Super-sensitising combination in photographic silver halide emulsion |
| US3955979A (en) * | 1970-10-16 | 1976-05-11 | Fuji Photo Film Co., Ltd. | Flash exposure of supersensitized silver halide photographic light-sensitive material |
| US4337307A (en) * | 1979-12-03 | 1982-06-29 | Hoechst Aktiengesellschaft | Light-sensitive diazo composition and material with branched polyurethane resin |
| US4622290A (en) * | 1984-11-09 | 1986-11-11 | Mitsubishi Paper Mills, Ltd. | Silver halide photographic emulsion |
| US5597687A (en) * | 1990-08-16 | 1997-01-28 | Eastman Kodak Company | Sensitizing dye combination for photographic materials |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA988772A (en) * | 1970-10-16 | 1976-05-11 | Keisuke Shiba | Photographic process utilizing a new silver halide light-sensitive element |
| JPS516536B2 (enrdf_load_stackoverflow) * | 1971-08-14 | 1976-02-28 | ||
| JPS5036975B2 (enrdf_load_stackoverflow) * | 1971-10-18 | 1975-11-28 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2075048A (en) * | 1932-11-04 | 1937-03-30 | Eastman Kodak Co | Photographic emulsion containing supersensitized carbocyanines |
| US3522052A (en) * | 1965-11-06 | 1970-07-28 | Fuji Photo Film Co Ltd | Photographic supersensitized silver halide emulsions |
-
1969
- 1969-06-07 DE DE19691929037 patent/DE1929037A1/de active Pending
- 1969-06-09 US US831714A patent/US3660099A/en not_active Expired - Lifetime
- 1969-06-10 GB GB1230731D patent/GB1230731A/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2075048A (en) * | 1932-11-04 | 1937-03-30 | Eastman Kodak Co | Photographic emulsion containing supersensitized carbocyanines |
| US3522052A (en) * | 1965-11-06 | 1970-07-28 | Fuji Photo Film Co Ltd | Photographic supersensitized silver halide emulsions |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3955979A (en) * | 1970-10-16 | 1976-05-11 | Fuji Photo Film Co., Ltd. | Flash exposure of supersensitized silver halide photographic light-sensitive material |
| US3819383A (en) * | 1971-07-12 | 1974-06-25 | Ilford Ltd | Super-sensitising combination in photographic silver halide emulsion |
| US4337307A (en) * | 1979-12-03 | 1982-06-29 | Hoechst Aktiengesellschaft | Light-sensitive diazo composition and material with branched polyurethane resin |
| US4622290A (en) * | 1984-11-09 | 1986-11-11 | Mitsubishi Paper Mills, Ltd. | Silver halide photographic emulsion |
| US5597687A (en) * | 1990-08-16 | 1997-01-28 | Eastman Kodak Company | Sensitizing dye combination for photographic materials |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1929037A1 (de) | 1970-05-21 |
| GB1230731A (enrdf_load_stackoverflow) | 1971-05-05 |
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