GB382815A - Process for the reversal development of light-sensitive silver halide layers - Google Patents
Process for the reversal development of light-sensitive silver halide layersInfo
- Publication number
- GB382815A GB382815A GB1481/32A GB148132A GB382815A GB 382815 A GB382815 A GB 382815A GB 1481/32 A GB1481/32 A GB 1481/32A GB 148132 A GB148132 A GB 148132A GB 382815 A GB382815 A GB 382815A
- Authority
- GB
- United Kingdom
- Prior art keywords
- development
- light
- silver halide
- reversal development
- sensitive silver
- 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
- -1 silver halide Chemical class 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 2
- 229910052709 silver Inorganic materials 0.000 title abstract 2
- 239000004332 silver Substances 0.000 title abstract 2
- 239000005864 Sulphur Substances 0.000 abstract 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 abstract 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Natural products NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- HTKFORQRBXIQHD-UHFFFAOYSA-N allylthiourea Chemical compound NC(=S)NCC=C HTKFORQRBXIQHD-UHFFFAOYSA-N 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- PGWMQVQLSMAHHO-UHFFFAOYSA-N sulfanylidenesilver Chemical compound [Ag]=S PGWMQVQLSMAHHO-UHFFFAOYSA-N 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/50—Reversal development; Contact processes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
382,815. Photographic reversal processes. I. G. FARBENINDUSTRIE AKT.- GES., Frankfort-on-Main, Germany. Jan. 18, 1932, No. 1481. Convention date, Jan. 17, 1931. [Class 98 (ii).] In the reversal development of silver images without a second exposure to light, the use of an alkali sulphide for the second development is avoided by substituting an alkaline developer, such as metol-hydroquinone, containing a small quantity of an odourless sulphur compound, such as thiosinamine, or thiourea, which does not colour the finished picture and is capable of forming developable nuclei of silver sulphide. The second development is possible by a lengthy action (e.g. 20 minutes) of the alkaline developer alone ; the addition of the sulphur compound shortens the time of development considerably (e.g. to 1 minute). The compound may be made up with a developer in solid form.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE382815X | 1931-01-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB382815A true GB382815A (en) | 1932-11-03 |
Family
ID=6361165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1481/32A Expired GB382815A (en) | 1931-01-17 | 1932-01-18 | Process for the reversal development of light-sensitive silver halide layers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US1970869A (en) |
| FR (1) | FR729871A (en) |
| GB (1) | GB382815A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3666648A (en) * | 1969-11-05 | 1972-05-30 | Ibm | In-situ reclamation of master patterns for printing microcircuit images on reversely sensitized material |
| US4186009A (en) * | 1978-05-30 | 1980-01-29 | Eastman Kodak Company | Covering power photothermographic material and process |
-
1932
- 1932-01-15 US US586969A patent/US1970869A/en not_active Expired - Lifetime
- 1932-01-16 FR FR729871D patent/FR729871A/en not_active Expired
- 1932-01-18 GB GB1481/32A patent/GB382815A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR729871A (en) | 1932-08-02 |
| US1970869A (en) | 1934-08-21 |
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