GB940152A - Direct positive photographic materials - Google Patents
Direct positive photographic materialsInfo
- Publication number
- GB940152A GB940152A GB8928/61A GB892861A GB940152A GB 940152 A GB940152 A GB 940152A GB 8928/61 A GB8928/61 A GB 8928/61A GB 892861 A GB892861 A GB 892861A GB 940152 A GB940152 A GB 940152A
- Authority
- GB
- United Kingdom
- Prior art keywords
- photographic materials
- direct positive
- positive photographic
- dimethylethylene
- direct
- 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
- SDTXSEXYPROZSZ-UHFFFAOYSA-N 1,2-dibromo-2-methylpropane Chemical compound CC(C)(Br)CBr SDTXSEXYPROZSZ-UHFFFAOYSA-N 0.000 abstract 1
- BXXWFOGWXLJPPA-UHFFFAOYSA-N 2,3-dibromobutane Chemical compound CC(Br)C(C)Br BXXWFOGWXLJPPA-UHFFFAOYSA-N 0.000 abstract 1
- 239000003153 chemical reaction reagent Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N iso-butene Natural products CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D471/00—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00
- C07D471/12—Heterocyclic compounds containing nitrogen atoms as the only ring hetero atoms in the condensed system, at least one ring being a six-membered ring with one nitrogen atom, not provided for by groups C07D451/00 - C07D463/00 in which the condensed system contains three hetero rings
- C07D471/14—Ortho-condensed systems
-
- 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
- G03C1/485—Direct positive emulsions
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Plural Heterocyclic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
1, 11-(1,1-Dimethylethylene)-2, 21-dipyridylium dibromide is prepared by heating together 2,21-dipyridyl and 1,2-dibromo-2-methyl-propane at 130 DEG C. for 15 hours. By using 2,3-dibromobutane as the second reagent, 1,11-(1,2-dimethylethylene-2,21-dipyridylium dibromide is obtained.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3124458D US3124458A (en) | 1961-03-10 | Direct positive photographic materials | |
NL275770D NL275770A (en) | 1961-03-10 | ||
NL120472D NL120472C (en) | 1961-03-10 | ||
GB8928/61A GB940152A (en) | 1961-03-10 | 1961-03-10 | Direct positive photographic materials |
FR890464A FR1317068A (en) | 1961-03-10 | 1962-03-08 | Production of direct positive photographic elements |
DEJ21412A DE1170779B (en) | 1961-03-10 | 1962-03-09 | Direct positive photographic material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8928/61A GB940152A (en) | 1961-03-10 | 1961-03-10 | Direct positive photographic materials |
Publications (1)
Publication Number | Publication Date |
---|---|
GB940152A true GB940152A (en) | 1963-10-23 |
Family
ID=9862028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8928/61A Expired GB940152A (en) | 1961-03-10 | 1961-03-10 | Direct positive photographic materials |
Country Status (4)
Country | Link |
---|---|
US (1) | US3124458A (en) |
DE (1) | DE1170779B (en) |
GB (1) | GB940152A (en) |
NL (2) | NL275770A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3326687A (en) * | 1964-11-10 | 1967-06-20 | Eastman Kodak Co | Photographic colloid transfer system |
US3642477A (en) * | 1969-04-24 | 1972-02-15 | Keuffel & Esser Co | Imaging method |
US3628958A (en) * | 1970-03-02 | 1971-12-21 | Eastman Kodak Co | Bipyridinium compound/nitrosubstituted n-heterocyclic compound desensitized silver halide emulsion |
JPS5647544B2 (en) * | 1973-03-27 | 1981-11-10 | ||
US4036649A (en) * | 1976-06-17 | 1977-07-19 | E. I. Du Pont De Nemours And Company | Silver halide emulsion sensitized with a fused diazepine |
US4539291A (en) * | 1982-12-24 | 1985-09-03 | Fuji Photo Film Co., Ltd. | Direct positive silver halide photographic materials |
US6338940B1 (en) * | 1998-06-26 | 2002-01-15 | Konica Corporation | Silver halide photographic light sensitive materials and image forming method by use thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL231639A (en) * | 1957-08-19 | |||
NL127363C (en) * | 1958-11-12 |
-
0
- US US3124458D patent/US3124458A/en not_active Expired - Lifetime
- NL NL120472D patent/NL120472C/xx active
- NL NL275770D patent/NL275770A/xx unknown
-
1961
- 1961-03-10 GB GB8928/61A patent/GB940152A/en not_active Expired
-
1962
- 1962-03-09 DE DEJ21412A patent/DE1170779B/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US3124458A (en) | 1964-03-10 |
NL120472C (en) | |
NL275770A (en) | |
DE1170779B (en) | 1964-05-21 |
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