GB154198A - Improvements in photographic developers - Google Patents
Improvements in photographic developersInfo
- Publication number
- GB154198A GB154198A GB32883/20A GB3288320A GB154198A GB 154198 A GB154198 A GB 154198A GB 32883/20 A GB32883/20 A GB 32883/20A GB 3288320 A GB3288320 A GB 3288320A GB 154198 A GB154198 A GB 154198A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ortho
- para
- acids
- water
- grm
- 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/29—Development processes or agents therefor
- G03C5/30—Developers
- G03C5/3021—Developers with oxydisable hydroxyl or amine groups linked to an aromatic ring
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)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
154,198. Hauff & Co. Ges., J. Oct. 23, 1918, [Convention date]. Developing.-Relates to photographic developers of the amidophenol or amidocresol class and comprises the employment of para-amidosalicylo acids or of ortho-para diamidosalicyclo acids treated with a solution of free alkali. A developer instanced contains concentrated amidosalicylic acid (100 grm.), sulphite free from water (500 grm.), normal lye of 5-fold strength (210 c.c.), and water (4790 c.c.). For use, this stock solution is diluted with an equal or double quantity of water and a further quantity of ordinary soda lye added according to the exposure and requirements. The Specification as open to inspection under Sect. 91 (3) (a) also includes the use of developers in which alkaline salts of the sulpho-acids of the ortho- or para-amidophenols or the ortho-paradiamidophenols are present. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 1736/91.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE327111T | 1918-10-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB154198A true GB154198A (en) | 1922-05-22 |
Family
ID=5676192
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB32883/20A Expired GB154198A (en) | 1918-10-23 | 1920-11-22 | Improvements in photographic developers |
Country Status (3)
Country | Link |
---|---|
DE (3) | DE327111C (en) |
FR (1) | FR525794A (en) |
GB (1) | GB154198A (en) |
-
1918
- 1918-10-23 DE DE1918327111D patent/DE327111C/en not_active Expired
- 1918-12-09 DE DE1918328617D patent/DE328617C/en not_active Expired
-
1920
- 1920-04-17 DE DE1920333687D patent/DE333687C/en not_active Expired
- 1920-10-11 FR FR525794D patent/FR525794A/en not_active Expired
- 1920-11-22 GB GB32883/20A patent/GB154198A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE327111C (en) | 1921-02-07 |
DE333687C (en) | 1921-05-12 |
FR525794A (en) | 1921-09-27 |
DE328617C (en) | 1921-02-07 |
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