GB1221137A - Photographic silver halide emulsions - Google Patents
Photographic silver halide emulsionsInfo
- Publication number
- GB1221137A GB1221137A GB4002668A GB4002668A GB1221137A GB 1221137 A GB1221137 A GB 1221137A GB 4002668 A GB4002668 A GB 4002668A GB 4002668 A GB4002668 A GB 4002668A GB 1221137 A GB1221137 A GB 1221137A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silver halide
- emulsion
- chelating agent
- photographic
- acetic acid
- 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
Links
- 239000000839 emulsion Substances 0.000 title abstract 10
- 229910052709 silver Inorganic materials 0.000 title abstract 8
- 239000004332 silver Substances 0.000 title abstract 8
- -1 silver halide Chemical class 0.000 title abstract 7
- 239000002738 chelating agent Substances 0.000 abstract 4
- 238000000034 method Methods 0.000 abstract 3
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 206010034960 Photophobia Diseases 0.000 abstract 1
- 206010070834 Sensitisation Diseases 0.000 abstract 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000084 colloidal system Substances 0.000 abstract 1
- 208000013469 light sensitivity Diseases 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 230000008313 sensitization Effects 0.000 abstract 1
- 239000000126 substance Substances 0.000 abstract 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
- G03C1/10—Organic substances
-
- 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
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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
1,221,137. Photographic silver halide emulsions. ILFORD Ltd. Aug. 20, 1969 [Aug.21, 1968], No.40026/68. Heading G2C. A process for the production of a photographic colloid silver halide emulsion comprises forming the silver halide grains in the presence of a metal chelating agent which is diethylene triamine- N, N , N<SP>1</SP>, N<SP>11</SP>, N<SP>11</SP>-penta-acetic acid, triethylene tetramine-N; N , N1 , N<SP>11</SP>, N<SP>111</SP>, N<SP>111</SP>-hexa-acetic acid or 1, 2-diaminocydohexane-N, N, N<SP>1</SP>, N<SP>1</SP>- tetra-acetic acid. Preferably at least 3g. of the said chelating agent per gram mol of silver is present during the formation of the silver halide grains. The silver halide emulsions of the present invention have enhanced light-sensitivity. However if the chelating agent is added at a later stage in the emulsion making process no sensitivity enhancement of the resulting silver halide emulsion is obtained. Specification 1, 221, 138 discloses a process for the production of a photographic emulsion having a reduced tendency to develop desensitized spots due to inclusions in the emulsion, whichcomprises adding to the emulsion, after the chemical sensitization of the emulsion, but before it is coated on a support to form a photographic material, a metal chelating agent as defined above.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4002668A GB1221137A (en) | 1968-08-21 | 1968-08-21 | Photographic silver halide emulsions |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4002668A GB1221137A (en) | 1968-08-21 | 1968-08-21 | Photographic silver halide emulsions |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1221137A true GB1221137A (en) | 1971-02-03 |
Family
ID=10412795
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4002668A Expired GB1221137A (en) | 1968-08-21 | 1968-08-21 | Photographic silver halide emulsions |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1221137A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4873184A (en) * | 1988-02-05 | 1989-10-10 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide photothermographic emulsions |
US5013622A (en) * | 1986-12-12 | 1991-05-07 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide emulsions |
EP0943956A1 (en) * | 1998-03-18 | 1999-09-22 | Imation Corp. | Radiographic material having antispot protection and improved speed to Dmin ratio |
-
1968
- 1968-08-21 GB GB4002668A patent/GB1221137A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5013622A (en) * | 1986-12-12 | 1991-05-07 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide emulsions |
US4873184A (en) * | 1988-02-05 | 1989-10-10 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide photothermographic emulsions |
JPH024241A (en) * | 1988-02-05 | 1990-01-09 | Minnesota Mining & Mfg Co <3M> | Silver halide thermal development type photographic emulsion |
EP0943956A1 (en) * | 1998-03-18 | 1999-09-22 | Imation Corp. | Radiographic material having antispot protection and improved speed to Dmin ratio |
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