BE510220A - - Google Patents
Info
- Publication number
- BE510220A BE510220A BE510220DA BE510220A BE 510220 A BE510220 A BE 510220A BE 510220D A BE510220D A BE 510220DA BE 510220 A BE510220 A BE 510220A
- Authority
- BE
- Belgium
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
- G03C1/485—Direct positive emulsions
- G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
- G03C1/48546—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent
- G03C1/48561—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent hydrazine compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US218072A US2604400A (en) | 1951-03-28 | 1951-03-28 | Naphthyl hydrazine sulfonic acids in direct positive photographic processes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE510220A true BE510220A (US06515009-20030204-C00004.png) |
Family
ID=22813626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE510220D BE510220A (US06515009-20030204-C00004.png) | 1951-03-28 |
Country Status (5)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE512294A (US06515009-20030204-C00004.png) * | 1951-06-27 | |||
| NL246283A (US06515009-20030204-C00004.png) * | 1958-12-11 |
-
0
- BE BE510220D patent/BE510220A/xx unknown
-
1951
- 1951-03-28 US US218072A patent/US2604400A/en not_active Expired - Lifetime
-
1952
- 1952-03-21 DE DEE5231A patent/DE925691C/de not_active Expired
- 1952-03-28 GB GB8003/52A patent/GB712355A/en not_active Expired
- 1952-03-28 FR FR65219D patent/FR65219E/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB712355A (en) | 1954-07-21 |
| DE925691C (de) | 1955-03-28 |
| FR65219E (fr) | 1956-02-07 |
| US2604400A (en) | 1952-07-22 |
