GB1221138A - Photographic silver halide emulsions - Google Patents
Photographic silver halide emulsionsInfo
- Publication number
- GB1221138A GB1221138A GB4002768A GB4002768A GB1221138A GB 1221138 A GB1221138 A GB 1221138A GB 4002768 A GB4002768 A GB 4002768A GB 4002768 A GB4002768 A GB 4002768A GB 1221138 A GB1221138 A GB 1221138A
- Authority
- GB
- United Kingdom
- Prior art keywords
- emulsion
- silver halide
- acetic acid
- photographic silver
- per gram
- 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 7
- 239000004332 silver Substances 0.000 title abstract 7
- -1 silver halide Chemical class 0.000 title abstract 7
- 239000002738 chelating agent Substances 0.000 abstract 4
- 206010070834 Sensitisation Diseases 0.000 abstract 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-N acetic acid Substances CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 abstract 2
- ZTOGYGRJDIWKAQ-UHFFFAOYSA-N cyclohexene-1,2-diamine Chemical compound NC1=C(N)CCCC1 ZTOGYGRJDIWKAQ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 230000008313 sensitization Effects 0.000 abstract 2
- 239000000126 substance Substances 0.000 abstract 2
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 abstract 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract 1
- 239000001828 Gelatine Substances 0.000 abstract 1
- 239000007864 aqueous solution Substances 0.000 abstract 1
- 229910052802 copper Inorganic materials 0.000 abstract 1
- 239000010949 copper Substances 0.000 abstract 1
- 229920000159 gelatin Polymers 0.000 abstract 1
- 235000019322 gelatine Nutrition 0.000 abstract 1
- 229910001385 heavy metal Inorganic materials 0.000 abstract 1
- 239000002923 metal particle Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 abstract 1
- 229960001124 trientine Drugs 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
- G03C1/33—Spot-preventing agents
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)
Abstract
1,221,138. Photographic silver halide emulsions. IL FORD Ltd. Aug. 20, 1969 [Aug. 21, 1968], No.40027/68. Heading G2C. A process for the production of a photographic silver halide emulsion comprises adding to the emulsion, after chemical sensitization and before it is coated on to a base, 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, N<SP>1</SP>, N<SP>11</SP>, N<SP>111</SP>, N<SP>111</SP>-hexa-acetic acid or 1, 2-diaminocyclohexane-N, N, N<SP>1</SP>, N<SP>1</SP>-tetra-acetic acid. The amount of chelating agent added is preferably 0À3 to 1O per gram mol of silver halide in the emulsion and in the case of diethylene triamine-N, N, N1 , Nii, N<SP>11</SP>-penta-acetic acid or triethylene tetramine-N , N , N<SP>1</SP>, N<SP>11</SP>, N<SP>111</SP>, N<SP>111</SP>-hexa-acetic acid 3g. per gram mol of silver halide in the emulsion and in the case of 1, 2-diaminocyclohexane-N, N, N<SP>1</SP>, N<SP>1</SP>-tetra-acetic acid 6g. per gram mol of silver halide in the emulsion. The metal chelating agent is preferably added to the photographic silver halide emulsion as an aqueous solution. The object of the present invention is to reduce the spot-producing effect of heavy metal particles in the emulsion or in operative contact therewith. In the example copper particles are dispersed in an aqueous gelatine solution which is coated on a support. The chelating agents are added after chemical sensitization because they affect the sensitivity of the emulsion as described in Specification 1, 221, 137.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4002768A GB1221138A (en) | 1968-09-21 | 1968-09-21 | Photographic silver halide emulsions |
| NL6912619A NL6912619A (en) | 1968-09-21 | 1969-08-19 | |
| DE19691942385 DE1942385A1 (en) | 1968-09-21 | 1969-08-20 | Process for preparing a silver halide photographic emulsion and a silver halide photographic emulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4002768A GB1221138A (en) | 1968-09-21 | 1968-09-21 | Photographic silver halide emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1221138A true GB1221138A (en) | 1971-02-03 |
Family
ID=10412801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4002768A Expired GB1221138A (en) | 1968-09-21 | 1968-09-21 | Photographic silver halide emulsions |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1942385A1 (en) |
| GB (1) | GB1221138A (en) |
| NL (1) | NL6912619A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271260A2 (en) * | 1986-12-12 | 1988-06-15 | 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 |
| EP0943956A1 (en) * | 1998-03-18 | 1999-09-22 | Imation Corp. | Radiographic material having antispot protection and improved speed to Dmin ratio |
-
1968
- 1968-09-21 GB GB4002768A patent/GB1221138A/en not_active Expired
-
1969
- 1969-08-19 NL NL6912619A patent/NL6912619A/xx unknown
- 1969-08-20 DE DE19691942385 patent/DE1942385A1/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0271260A2 (en) * | 1986-12-12 | 1988-06-15 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide emulsions |
| US5013622A (en) * | 1986-12-12 | 1991-05-07 | Minnesota Mining And Manufacturing Company | Supersensitization of silver halide emulsions |
| EP0271260B1 (en) * | 1986-12-12 | 1995-01-04 | 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1942385A1 (en) | 1970-02-26 |
| NL6912619A (en) | 1970-02-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |