US3832180A - Photographic material - Google Patents
Photographic material Download PDFInfo
- Publication number
- US3832180A US3832180A US00188464A US18846471A US3832180A US 3832180 A US3832180 A US 3832180A US 00188464 A US00188464 A US 00188464A US 18846471 A US18846471 A US 18846471A US 3832180 A US3832180 A US 3832180A
- Authority
- US
- United States
- Prior art keywords
- emulsion
- development
- polyethylene oxide
- mercapto
- lith
- 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
- 239000000463 material Substances 0.000 title abstract description 24
- 239000000839 emulsion Substances 0.000 abstract description 43
- -1 SILVER HALIDE Chemical class 0.000 abstract description 27
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 abstract description 22
- 229920003171 Poly (ethylene oxide) Polymers 0.000 abstract description 20
- 229910052709 silver Inorganic materials 0.000 abstract description 19
- 239000004332 silver Substances 0.000 abstract description 19
- 238000000034 method Methods 0.000 abstract description 16
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 12
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 abstract description 8
- 229910017464 nitrogen compound Inorganic materials 0.000 abstract description 8
- 229910052799 carbon Inorganic materials 0.000 abstract description 5
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 5
- 150000003585 thioureas Chemical class 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 150000001721 carbon Chemical class 0.000 abstract 1
- 150000002830 nitrogen compounds Chemical class 0.000 abstract 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen(.) Chemical compound [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 abstract 1
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 24
- 150000001875 compounds Chemical class 0.000 description 11
- 238000007792 addition Methods 0.000 description 5
- 208000015181 infectious disease Diseases 0.000 description 5
- 230000002458 infectious effect Effects 0.000 description 5
- 125000004432 carbon atom Chemical group C* 0.000 description 4
- 125000000623 heterocyclic group Chemical group 0.000 description 4
- 125000004433 nitrogen atom Chemical group N* 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 125000003396 thiol group Chemical group [H]S* 0.000 description 4
- UGWULZWUXSCWPX-UHFFFAOYSA-N 2-sulfanylideneimidazolidin-4-one Chemical compound O=C1CNC(=S)N1 UGWULZWUXSCWPX-UHFFFAOYSA-N 0.000 description 3
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 3
- PDQAZBWRQCGBEV-UHFFFAOYSA-N Ethylenethiourea Chemical compound S=C1NCCN1 PDQAZBWRQCGBEV-UHFFFAOYSA-N 0.000 description 3
- 241000605112 Scapanulus oweni Species 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UMURLIQHQSKULR-UHFFFAOYSA-N 1,3-oxazolidine-2-thione Chemical compound S=C1NCCO1 UMURLIQHQSKULR-UHFFFAOYSA-N 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 2
- KFFQABQEJATQAT-UHFFFAOYSA-N N,N'-dibutylthiourea Chemical compound CCCCNC(=S)NCCCC KFFQABQEJATQAT-UHFFFAOYSA-N 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 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
- BXWNKGSJHAJOGX-UHFFFAOYSA-N hexadecan-1-ol Chemical compound CCCCCCCCCCCCCCCCO BXWNKGSJHAJOGX-UHFFFAOYSA-N 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- KIWUVOGUEXMXSV-UHFFFAOYSA-N rhodanine Chemical compound O=C1CSC(=S)N1 KIWUVOGUEXMXSV-UHFFFAOYSA-N 0.000 description 2
- 231100000489 sensitizer Toxicity 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- AFBBKYQYNPNMAT-UHFFFAOYSA-N 1h-1,2,4-triazol-1-ium-3-thiolate Chemical compound SC=1N=CNN=1 AFBBKYQYNPNMAT-UHFFFAOYSA-N 0.000 description 1
- JAAIPIWKKXCNOC-UHFFFAOYSA-N 1h-tetrazol-1-ium-5-thiolate Chemical compound SC1=NN=NN1 JAAIPIWKKXCNOC-UHFFFAOYSA-N 0.000 description 1
- SNTWKPAKVQFCCF-UHFFFAOYSA-N 2,3-dihydro-1h-triazole Chemical compound N1NC=CN1 SNTWKPAKVQFCCF-UHFFFAOYSA-N 0.000 description 1
- OTVCBBXLGYYSNC-UHFFFAOYSA-N 3,4-dimethyl-1h-1,2,4-triazole-5-thione Chemical compound CC1=NN=C(S)N1C OTVCBBXLGYYSNC-UHFFFAOYSA-N 0.000 description 1
- YPXQSGWOGQPLQO-UHFFFAOYSA-N 5-nitro-1,3-dihydrobenzimidazole-2-thione Chemical compound [O-][N+](=O)C1=CC=C2N=C(S)NC2=C1 YPXQSGWOGQPLQO-UHFFFAOYSA-N 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 241001061127 Thione Species 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- SJOOOZPMQAWAOP-UHFFFAOYSA-N [Ag].BrCl Chemical compound [Ag].BrCl SJOOOZPMQAWAOP-UHFFFAOYSA-N 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- UMGDCJDMYOKAJW-UHFFFAOYSA-N aminothiocarboxamide Natural products NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 229960000541 cetyl alcohol Drugs 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- DXRFSTNITSDOKK-UHFFFAOYSA-N formaldehyde;sulfurous acid Chemical compound O=C.OS(O)=O DXRFSTNITSDOKK-UHFFFAOYSA-N 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- FBPFZTCFMRRESA-UHFFFAOYSA-N hexane-1,2,3,4,5,6-hexol Chemical class OCC(O)C(O)C(O)C(O)CO FBPFZTCFMRRESA-UHFFFAOYSA-N 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002866 paraformaldehyde Polymers 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- RWPGFSMJFRPDDP-UHFFFAOYSA-L potassium metabisulfite Chemical compound [K+].[K+].[O-]S(=O)S([O-])(=O)=O RWPGFSMJFRPDDP-UHFFFAOYSA-L 0.000 description 1
- 239000004297 potassium metabisulphite Substances 0.000 description 1
- 235000010263 potassium metabisulphite Nutrition 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-L thiosulfate(2-) Chemical compound [O-]S([S-])(=O)=O DHCDFWKWKRSZHF-UHFFFAOYSA-L 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
- G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
- G03C1/346—Organic derivatives of bivalent sulfur, selenium or tellurium
-
- 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
- G03C1/04—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with macromolecular additives; with layer-forming substances
- G03C1/043—Polyalkylene oxides; Polyalkylene sulfides; Polyalkylene selenides; Polyalkylene tellurides
-
- 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
- G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/15—Lithographic emulsion
Definitions
- This invention relates to the processing of photographic light-sensitive materials intended for use in recording halftone dot images or line images and which carry a gelatin silver halide emulsion of very high contrast characteristics.
- Photographic light-sensitive materials of the above type are designed to be developed in formaldehyde-containing low-sulphite hydroquinone deevelopers and when so developed the phenonmenon known as infectious development occurs.
- Emulsions of the foregoing type may be developed satisfactorily over a considerable range of development times, other development conditions being held constant.
- the effective speed of the lith emulsions increases as the development time is increased; this is the infectious development referred to above and accordingly it is a valuable property of such materials that by controlling development time it is possible to control the eifective emulsion speed.
- a process for the production of developed photographic material which comprises subjecting photographic lith material containing a latent silver image in a silver halide emulsion layer to development by means of a lithographic developer of the formaldehyde/bisulphite/ hydroquinone type, the development taking place in the presence of a water-soluble polyethylene oxide condensate which is a compound which comprises a polyethylene oxide chain ⁇ CH CH O ⁇ , where n is an integer from 5-200, and an organic mercapto compound selected from dialkyl substituted thioureas, and heterocyclic nitrogen compounds containing a mercapto group attached to a carbon atom which is in the alpha position with respect to a nitrogen atom in the heterocyclic ring.
- both the polyethylene oxied condensate and the organic mercapto compound are present initially in the photographic lith material either in the emulsion layer thereof or in the supercoat layer.
- lithographic developer of the formaldehyde/bisulphite/hydroquinone type is meant a developer system containing hydroquinone only as developing agent but with sulphite ion present as a formaldehyde bisulphite complex with an addition of up to 1% by weight of free sodium sulphite.
- the pH of the developer is maintained at values between 9.8-105. This formulation enhances infectious type development resulting in extremely high contrast of lith type emulsions.
- photographic lith material comprises a fine grain high contrast silver halide emulsion in which the halide generally comprises at least 50 mole percent chloride and less than 5 mole percent iodide, the remainder being bromide.
- the emulsion may be sensitised with gold salts and/or sulphur containing compounds such as thiosulphate or it may be reduction sensitised.
- the emulsion may also be optically sensitised and contain stablising agents for exam le tetrazindines.
- polyethylene oxide condensate any polymeric compound which com-prises -a polyethylene oxide chain of the type ⁇ CH CH --O ⁇ where n is from 5-200.
- Such compounds include polyethylene glycol and cbhdensation products of ethylene oxide with, for example, aliphatic alcohols, saturated aliphatic acids, alkyl substituted phenols and hexitol rings.
- Such compounds also "ice 3 include block copolylners of ethylene oxide with, for
- polypropylene oxide examples include polypropylene oxide.
- the polyethylene oxide condensate is present, as hereinbefore stated, in the photographic emulsion and when so present the preferred amount is 0.02 to 3 Emulsion: Y
- the organic mercapto compound is present, Wedge the uuat f
- Solution A Gr. per g. mol of silver present 1n the emu sion.
- the rg Sodium sulphite (cryst) 120 mercapto compound may be added to the emulslon at Hydroquinone 45 any stage before coating the emulsion on to the support.
- the organic mercapto compound mayb pre n potassium bromide 315 1n the lithographic developer and when so present the water to make 15001111 preferred concentration is 0.00001 to 0.001 g. per litre of developing solution.
- oluti n B2 G An example of a dialkyl substituted thiourea is NW Paraformaldehyde 15 dibutyl thiourea. Potassium metabisulphite 5,25 Examples of heterocyclic nitrogen compounds contain- So ium sulphite (cryst.) 1.05 ing a mercapto group attached to a carbon atom which is Water to make 500 ml.
- Emulsion lmeoa e a We The following Examples Will serve to illustrate the in- 68 log speed I; 01mm vention. I 2 A 2. 62 5 EXAMPLE 1 M II 2% 2. 91 8.5 Emulsion I 3.18 16 III 21 5 2.86 10 A gelatin silver chlorobromide emulsion containing 3A 12 31% silver bromide having a mean grain diameter of IV 1A 7.5 0.4 was sulphur sensitised, stabilised and treated with an 3A orthochromatic sensitising dye. 0.3 g.
- photographic material which comprises subjecting photographic lith material containing a latent silver image in a silver halide emulsion layer to development by means of a formaldehyde/bisulphite/hydroquinone lithographic developer, the process being characterized in that the development takes place in the presence of a water-soluble polyethylene oxide condensate which is a compound which comprises a polyethylene oxide chain where n is an integer from -200 and a heterocyclic nitrogen compound selected from the group consisting of ethylene thiourea, l-methyl-S-mercapto-l,2,3,4 teiraiole, 4,5-dimethyl-3-mercapto-1,2,4-triazole, 7-hydroxy-2-mercapto 5 methyl-1,3,3a,7-tetraazindene, rhodanine, thiazolidene 2 thione, thiohydantoin and oxazolidine 2- thione.
- a water-soluble polyethylene oxide condensate which
- a process according to claim 2 wherein from 0.001 to 0.1 g. of the heterocyclic nitrogen compound per g. mole of the silver in the emulsion is present in the emulsion.
- a process for the production of developed photographic material which comprises subjecting photographic lith material containing a latent silver image in a silver halide emulsion layer to development by means of a formaldehyde/bisulphite/hydroquinone lithographic developer, the process being characterized in that the development takes place in the present of a water-soluble polyethylene oxide condensate which is a compound which comprises a polyethylene oxide chain ⁇ CH CH O ⁇ where n is an integer from 5-200 and l-methyl-S-mercapto-l,2,3,4-tetrazole.
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)
- Photosensitive Polymer And Photoresist Processing (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB32955/69A GB1248530A (en) | 1969-06-30 | 1969-06-30 | Photographic lith development |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3832180A true US3832180A (en) | 1974-08-27 |
Family
ID=10346488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US00188464A Expired - Lifetime US3832180A (en) | 1969-06-30 | 1971-10-12 | Photographic material |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3832180A (fr) |
| BE (1) | BE752768A (fr) |
| CH (1) | CH550422A (fr) |
| DE (1) | DE2032049C2 (fr) |
| FR (1) | FR2051465A5 (fr) |
| GB (1) | GB1248530A (fr) |
| NL (1) | NL166553C (fr) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3947273A (en) * | 1973-06-01 | 1976-03-30 | Agfa-Gevaert, N. V. | Development modifiers for silver halide emulsions |
| US4001020A (en) * | 1971-03-04 | 1977-01-04 | Fuji Photo Film Co., Ltd. | Developing a silver ha1ide emulsion in contact with a heterocyclic thione and a polyalkylene oxide |
| US4043817A (en) * | 1974-11-07 | 1977-08-23 | Fuji Photo Film Co., Ltd. | Method of forming photographic images for lithographic use |
| US4108662A (en) * | 1976-01-28 | 1978-08-22 | Fuji Photo Film Co., Ltd. | Process for developing photographic light-sensitive materials for the graphic arts |
| US4210715A (en) * | 1975-08-02 | 1980-07-01 | Konishiroku Photo Industry Co., Ltd. | Light-sensitive silver halide photographic material and method of processing thereof |
| US4233400A (en) * | 1975-08-02 | 1980-11-11 | Konishiroku Photo Industry Co., Ltd. | Light-sensitive silver halide photographic material containing tetrazolium compounds |
| US4808516A (en) * | 1987-07-21 | 1989-02-28 | Eastman Kodak Company | Photographic emulsion and element |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5551169B2 (fr) * | 1972-05-25 | 1980-12-23 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2423549A (en) * | 1945-01-10 | 1947-07-08 | Du Pont | Silver halide photographic emulsions sensitized by polyalkylene glycols |
| US3148987A (en) * | 1961-10-02 | 1964-09-15 | Gevaert Photo Prod Nv | Photographic material |
-
1969
- 1969-06-30 GB GB32955/69A patent/GB1248530A/en not_active Expired
-
1970
- 1970-06-29 NL NL7009588.A patent/NL166553C/xx not_active IP Right Cessation
- 1970-06-29 DE DE2032049A patent/DE2032049C2/de not_active Expired
- 1970-06-29 CH CH981970A patent/CH550422A/xx not_active IP Right Cessation
- 1970-06-30 FR FR7024174A patent/FR2051465A5/fr not_active Expired
- 1970-06-30 BE BE752768D patent/BE752768A/fr unknown
-
1971
- 1971-10-12 US US00188464A patent/US3832180A/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4001020A (en) * | 1971-03-04 | 1977-01-04 | Fuji Photo Film Co., Ltd. | Developing a silver ha1ide emulsion in contact with a heterocyclic thione and a polyalkylene oxide |
| US3947273A (en) * | 1973-06-01 | 1976-03-30 | Agfa-Gevaert, N. V. | Development modifiers for silver halide emulsions |
| US4043817A (en) * | 1974-11-07 | 1977-08-23 | Fuji Photo Film Co., Ltd. | Method of forming photographic images for lithographic use |
| US4210715A (en) * | 1975-08-02 | 1980-07-01 | Konishiroku Photo Industry Co., Ltd. | Light-sensitive silver halide photographic material and method of processing thereof |
| US4233400A (en) * | 1975-08-02 | 1980-11-11 | Konishiroku Photo Industry Co., Ltd. | Light-sensitive silver halide photographic material containing tetrazolium compounds |
| US4108662A (en) * | 1976-01-28 | 1978-08-22 | Fuji Photo Film Co., Ltd. | Process for developing photographic light-sensitive materials for the graphic arts |
| US4808516A (en) * | 1987-07-21 | 1989-02-28 | Eastman Kodak Company | Photographic emulsion and element |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2032049C2 (de) | 1982-06-24 |
| NL7009588A (fr) | 1971-01-04 |
| GB1248530A (en) | 1971-10-06 |
| BE752768A (fr) | 1970-12-01 |
| NL166553B (nl) | 1981-03-16 |
| FR2051465A5 (fr) | 1971-04-02 |
| DE2032049A1 (de) | 1971-01-14 |
| CH550422A (de) | 1974-06-14 |
| NL166553C (nl) | 1981-08-17 |
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