GB636974A - Improvements relating to photographic emulsions - Google Patents
Improvements relating to photographic emulsionsInfo
- Publication number
- GB636974A GB636974A GB27660/47A GB2766047A GB636974A GB 636974 A GB636974 A GB 636974A GB 27660/47 A GB27660/47 A GB 27660/47A GB 2766047 A GB2766047 A GB 2766047A GB 636974 A GB636974 A GB 636974A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diethyl
- bromide
- dye
- iodide
- emulsion
- 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 6
- 239000000975 dye Substances 0.000 abstract 7
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract 4
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 abstract 4
- -1 bromiodide Chemical compound 0.000 abstract 4
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 abstract 4
- 230000035945 sensitivity Effects 0.000 abstract 3
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 abstract 2
- 230000003595 spectral effect Effects 0.000 abstract 2
- 125000001424 substituent group Chemical group 0.000 abstract 2
- ANRHNWWPFJCPAZ-UHFFFAOYSA-M thionine Chemical compound [Cl-].C1=CC(N)=CC2=[S+]C3=CC(N)=CC=C3N=C21 ANRHNWWPFJCPAZ-UHFFFAOYSA-M 0.000 abstract 2
- 241001637516 Polygonia c-album Species 0.000 abstract 1
- 125000002252 acyl group Chemical group 0.000 abstract 1
- 125000004423 acyloxy group Chemical group 0.000 abstract 1
- 125000003545 alkoxy group Chemical group 0.000 abstract 1
- 125000000217 alkyl group Chemical group 0.000 abstract 1
- 125000004414 alkyl thio group Chemical group 0.000 abstract 1
- 125000003118 aryl group Chemical group 0.000 abstract 1
- 125000004104 aryloxy group Chemical group 0.000 abstract 1
- CODNYICXDISAEA-UHFFFAOYSA-N bromine monochloride Chemical compound BrCl CODNYICXDISAEA-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 230000029087 digestion Effects 0.000 abstract 1
- 125000005843 halogen group Chemical group 0.000 abstract 1
- 125000002768 hydroxyalkyl group Chemical group 0.000 abstract 1
- 150000003222 pyridines Chemical class 0.000 abstract 1
- ADZWSOLPGZMUMY-UHFFFAOYSA-M silver bromide Chemical compound [Ag]Br ADZWSOLPGZMUMY-UHFFFAOYSA-M 0.000 abstract 1
- 238000005406 washing Methods 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
- G03C1/28—Sensitivity-increasing substances together with supersensitising substances
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)
- Plural Heterocyclic Compounds (AREA)
- Photoreceptors In Electrophotography (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
636,974. Sensitized photographic emulsions. KODAK, Ltd. Oct. 15, 1947, No. 27660. Convention date, Dec. 29, 1945. [Class 98 (ii)] The spectral sensitivity of a light-sensitive silver bromide, bromiodide, or chlorobromide emulsion and sensitized with a cyanine dye is modified by incorporating therein a pyridine base having at least one substituent on a carbon atom in the pyridine nucleus, and wherein all of the substituents present are selected from alkyl, alkoxy, hydroxyalkyl, aryl, aryloxy, alkylmercapto, arylmercapto, acyl and acyloxy groups and halogen atoms. The cyanine dye may be one which produces a second longer-wavelength sensitivity maximum at a higher concentration or on digestion of the emulsion at one concentration of the dye. 0.10 to 1.5 grams of pyridine base may be incorporated per litre of emulsion. Bases specified are 2-, 3-, and 4-methyl-, 2 : 3-, 2 : 4-, and 2 :6-dimethyl-, 2:3:4-trimethyl-, 2- ethyl-, 2-propyl-, 2- and 3-phenyl-, 2-benzyl-, 3-ethoxy-, 3-acetoxy-, 3-methylmercapto-, 2- chloro-, 3 :5-dichloro-, and 3 5-dibromopyridine. Dyes specified are 3 : 1<SP>1</SP>-diethyl-6<SP>1</SP>- methoxy - 21 - cyanine iodide, 3 : 3<SP>1</SP> - diethyl- 9 - methylthiacarbocyanine bromide, 9 - ethyl- 3 : 3<SP>1</SP> - dimethylthiacarbocyanine bromide, 51 - chloro - 3 : 31 : 9 - triethylthiacarbocyanine iodide, 5 : 5<SP>1</SP> - dichloro - 3 : 3<SP>1</SP> : 9 - triethylthiacarbocyanine iodide, 3: 3<SP>1</SP> -diethyl - 9- methyl - 4 : 5 : 4<SP>1</SP> : 5<SP>1</SP> - dibenzthiacarbocyanine bromide, 3 : 3<SP>1</SP> - diethyl - 9 - methylselenathiacarbocyanine bromide, 51 - chloro- 3 : 3<SP>1</SP> - diethyl - 9 - methylselenathiacarbocyanine iodide, and 3 ; : 3<SP>1</SP>-diethyl-9-methylselenacarbocyanine bromide. More than one dye and more than one base may be used, and the base and dye may be added in either order or simultaneously, preferably to the finished emulsion after washing. Some bases increase the sensitivity in one spectral region and reduce it in another. Examples are given showing the red and minus blue speeds and gammas with specified bases and dyes. Specifications 498,290, 498,291 and 515,372 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US638492A US2478369A (en) | 1945-12-29 | 1945-12-29 | Supersensitized silver halide photographic emulsion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB636974A true GB636974A (en) | 1950-05-10 |
Family
ID=24560263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB27660/47A Expired GB636974A (en) | 1945-12-29 | 1947-10-15 | Improvements relating to photographic emulsions |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2478369A (en) |
| BE (1) | BE470786A (en) |
| FR (1) | FR942920A (en) |
| GB (1) | GB636974A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE557658A (en) * | 1956-05-21 | |||
| BE557657A (en) * | 1956-05-21 | |||
| JPS51120223A (en) * | 1975-04-14 | 1976-10-21 | Konishiroku Photo Ind Co Ltd | Halogenized silver color photosensitive materials |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2158883A (en) * | 1937-03-29 | 1939-05-16 | Eastman Kodak Co | Photographic emulsion containing supersensitized-4'-carbocyanines |
| GB503318A (en) * | 1937-07-03 | 1939-03-30 | Ig Farbenindustrie Ag | Process of producing photographic colour pictures |
-
0
- BE BE470786D patent/BE470786A/xx unknown
-
1945
- 1945-12-29 US US638492A patent/US2478369A/en not_active Expired - Lifetime
-
1946
- 1946-12-27 FR FR942920D patent/FR942920A/en not_active Expired
-
1947
- 1947-10-15 GB GB27660/47A patent/GB636974A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE470786A (en) | |
| FR942920A (en) | 1949-02-22 |
| US2478369A (en) | 1949-08-09 |
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