GB428360A - Improvements in or relating to a process of treating photo-sensitive emulsions - Google Patents
Improvements in or relating to a process of treating photo-sensitive emulsionsInfo
- Publication number
- GB428360A GB428360A GB914535A GB914535A GB428360A GB 428360 A GB428360 A GB 428360A GB 914535 A GB914535 A GB 914535A GB 914535 A GB914535 A GB 914535A GB 428360 A GB428360 A GB 428360A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pyrazolone
- acetanilidovinyl
- nucleus
- alpha
- phenyl
- 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
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
- G03C1/12—Methine and polymethine dyes
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)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Abstract
428,360. Photographic sensitizers. KENDALL, J. D., 23, Roden Street, Ilford, Essex. Oct. 3, 1933, No. 9145/35. Divided out of 428,222. [Class 98 (ii)] A method of increasing the range of colour sensitivity of photographic silver halide emulsions comprises treating the emulsion with a 5-pyrazolone compound in which the carbonatom in the 4-position is linked directly or through a chain of not more than three carbon atoms to a heterocyclic nitrogen nucleus or to an aromatic carbocyclic nucleus having an amino or substituted amino group in the para position so that the carbon atom in the 4-position of the pyrazolone ring is linked to the nitrogen atom in the heterocyclic nucleus or in the amino group by a completely conjugate chain of carbon atoms. The compounds may be obtained by condensing a 5- pyrazolone with a quaternary salt of an alpha or y acetanilidovinyl or an alpha or y thioether derivative of a heterocyclic nitrogen compound. Compounds specified are 4-para-dimethylaminobenzal-1-phenyl-3-methyl- 5- pyrazolone, and the condensation products of 2-#-acetanilidovinyl-benzoxazole ethiodide and 1-3-3-trimethyl-2-(#-acetanilidovinyl-indolenium iodide with 1-phenyl-3-methyl-5-pyrazolone. Specification 426,718, [Group IV], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB914535A GB428360A (en) | 1933-10-03 | 1933-10-03 | Improvements in or relating to a process of treating photo-sensitive emulsions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB914535A GB428360A (en) | 1933-10-03 | 1933-10-03 | Improvements in or relating to a process of treating photo-sensitive emulsions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB428360A true GB428360A (en) | 1935-05-03 |
Family
ID=9866243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB914535A Expired GB428360A (en) | 1933-10-03 | 1933-10-03 | Improvements in or relating to a process of treating photo-sensitive emulsions |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB428360A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE754723C (en) * | 1935-06-06 | 1953-03-09 | Gevaert Photo Producten | Process for sensitizing photographic emulsions |
-
1933
- 1933-10-03 GB GB914535A patent/GB428360A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE754723C (en) * | 1935-06-06 | 1953-03-09 | Gevaert Photo Producten | Process for sensitizing photographic emulsions |
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