GB437807A - Method for sensitising photographic emulsions - Google Patents
Method for sensitising photographic emulsionsInfo
- Publication number
- GB437807A GB437807A GB7106/34A GB710634A GB437807A GB 437807 A GB437807 A GB 437807A GB 7106/34 A GB7106/34 A GB 7106/34A GB 710634 A GB710634 A GB 710634A GB 437807 A GB437807 A GB 437807A
- Authority
- GB
- United Kingdom
- Prior art keywords
- toluenesulphonate
- metho
- group
- dyes
- gelatino
- 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
- G03C1/14—Methine and polymethine dyes with an odd number of CH groups
- G03C1/16—Methine and polymethine dyes with an odd number of CH groups with one CH group
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)
Abstract
Cyanine dyes which sensitize gelatino-silver halide emulsions and which are pyrido cyanines having two single heterocyclic nuclei linked by a --CH = group, are prepared by the method disclosed in Specification 408,571, viz. the use of a strong organic base as acid binding agent. In examples, 2-iodopyridine methiodide is condensed with a -picoline methiodide, 2.4-dimethylthiazole ethiodide, 2.4 - dimethylselenazole metho - p - toluenesulphonate, 2.4 - dimethyloxazole metho - p - toluenesulphonate, and 2 - methylthiazoline metho - p - toluenesulphonate in alcohol and in presence of triethylamine. Specifications 369,947; 385,332, [Group XX]; 408,569; and 408,570, [Group XX], also are referred to. The Specification as open to inspection under Sect. 91 relates to gelatino-silver halide emulsions containing the above dyes and to the manufacture of these dyes by condensing quaternary salts of two compounds having single heterocyclic nuclei (of which at least one is a pyridine nucleus) in presence of a strong organic base as condensing agent. The subject-matter is equivalent to that which is disclosed in the Specification as open to inspection under Sect. 91 in respect of Specification 436,941. This subject-matter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US437807XA | 1933-03-06 | 1933-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB437807A true GB437807A (en) | 1935-11-06 |
Family
ID=21928857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7106/34A Expired GB437807A (en) | 1933-03-06 | 1934-03-06 | Method for sensitising photographic emulsions |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE658142C (en) |
| GB (1) | GB437807A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1293580B (en) * | 1966-01-20 | 1969-04-24 | Adox Du Pont Fotowerke | Spectrally sensitized silver halide photographic emulsion |
-
1933
- 1933-11-03 DE DEK132017D patent/DE658142C/en not_active Expired
-
1934
- 1934-03-06 GB GB7106/34A patent/GB437807A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE658142C (en) | 1938-05-20 |
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