GB252012A - An improved process for producing photographic papers for making prints from tracings - Google Patents
An improved process for producing photographic papers for making prints from tracingsInfo
- Publication number
- GB252012A GB252012A GB11968/26A GB1196826A GB252012A GB 252012 A GB252012 A GB 252012A GB 11968/26 A GB11968/26 A GB 11968/26A GB 1196826 A GB1196826 A GB 1196826A GB 252012 A GB252012 A GB 252012A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- exposure
- bichromate
- coating
- tracings
- 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
- G03C1/66—Compositions containing chromates as photosensitive substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Color Printing (AREA)
Abstract
252,012. Kammerer, H. May 7, 1925, [Convention date]. Papers; developing; bichromated colloid.- Paper for producing prints from tracings is prepared by coating it with a solution containing a chromate or bichromate and organic salts of heavy metals such as iron to which may be added one or more salts of manganese. The ferric salts of citric, oxalic, or tartaric acids are especially suitable. After exposure development is effected with aromatic amines, phenols or amidophenols, which may be acidified, or with there derivatives or substitution products. The developer may however be applied dry or in solution to the paper before exposure, in which case development is effected after exposure by applying a damp sponge, or by treatment with steam. Baryta paper may be used as a base for the coating. Prints in different colours may be obtained by choice of developer. An example is described in which a coating containing bichromate and ferric ammonium citrate is exposed and developed with a solution of aniline hydrochloride; or, alternatively is moistened before exposure with a solution of aniline, and developed after exposure with a damp sponge or steam. The sensitizing solution may be used in the preparation of gum bichromate papers.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE252012X | 1925-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB252012A true GB252012A (en) | 1926-11-18 |
Family
ID=5945886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11968/26A Expired GB252012A (en) | 1925-05-07 | 1926-05-07 | An improved process for producing photographic papers for making prints from tracings |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US1618931A (en) |
| GB (1) | GB252012A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2624673A (en) * | 1948-03-01 | 1953-01-06 | Warren S D Co | Photosensitive printing plate having a light-sensitive coating consisting of a nonprotein colloid, a phosphate, and a chromium compound |
| US2624672A (en) * | 1948-03-01 | 1953-01-06 | Warren S D Co | Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound |
| US2574258A (en) * | 1948-04-26 | 1951-11-06 | Warren S D Co | Light-sensitive compositions and plates for photolithography |
-
1926
- 1926-05-07 GB GB11968/26A patent/GB252012A/en not_active Expired
- 1926-06-14 US US116001A patent/US1618931A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US1618931A (en) | 1927-02-22 |
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