GB801106A - Improvements in or relating to the regeneration of photographic processing baths - Google Patents
Improvements in or relating to the regeneration of photographic processing bathsInfo
- Publication number
- GB801106A GB801106A GB856556A GB856556A GB801106A GB 801106 A GB801106 A GB 801106A GB 856556 A GB856556 A GB 856556A GB 856556 A GB856556 A GB 856556A GB 801106 A GB801106 A GB 801106A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bromide
- solution
- ferricyanide
- baths
- exchange membrane
- 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
- 230000008929 regeneration Effects 0.000 title abstract 2
- 238000011069 regeneration method Methods 0.000 title abstract 2
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 abstract 4
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract 2
- 239000003513 alkali Substances 0.000 abstract 2
- YAGKRVSRTSUGEY-UHFFFAOYSA-N ferricyanide Chemical compound [Fe+3].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] YAGKRVSRTSUGEY-UHFFFAOYSA-N 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 2
- 229910000042 hydrogen bromide Inorganic materials 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 229920001817 Agar Polymers 0.000 abstract 1
- 239000003011 anion exchange membrane Substances 0.000 abstract 1
- 239000002585 base Substances 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 239000007844 bleaching agent Substances 0.000 abstract 1
- 238000005341 cation exchange Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 238000005868 electrolysis reaction Methods 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract 1
- 238000005192 partition Methods 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
- G03C5/395—Regeneration of photographic processing agents other than developers; Replenishers therefor
- G03C5/3954—Electrical methods, e.g. electroytic silver recovery, electrodialysis
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Abstract
801,106. Electrolytic regeneration of ferricyanide photographic bleach baths. ILFORD, Ltd. Jan. 21, 1957 [March 19, 1956; July 10, 1956], Nos. 8565/56 and 21313/56. Class 41. [Also in Group XX] Ferricyanide -bromide baths for bleaching photographic elements (see Group XX) are regenerated by electrolysis, the cathode being immersed in a solution containing bromide ions which is prevented from mixing with the bath liquid. Preferably, the catholyte is an alkali bromide and is separated from the bath liquid by a cation exchange membrane 10 of a cell 4. In another form, Fig. 1 (not shown), the catholyte solution is contained in a glass cell having a sintered glass base plugged with agar gel and the alkali formed is neutralized by the addition of aqueous hydrogen bromide. A porous ceramic partition may alternatively be used. As shown, in a selfneutralizing cathodic arrangement an additional cathode compartment 11 containing a solution of hydrogen bromide and having an anion exchange membrane 12 is provided. Of the carbon electrodes 2, 7 and 13 either 7 or 13 may be omitted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2131356 | 1956-07-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB801106A true GB801106A (en) | 1958-09-10 |
Family
ID=10160763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB856556A Expired GB801106A (en) | 1956-07-10 | 1956-03-19 | Improvements in or relating to the regeneration of photographic processing baths |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB801106A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3634088A (en) * | 1970-02-02 | 1972-01-11 | Eastman Kodak Co | Regeneration of blix solutions used in photographic processing |
-
1956
- 1956-03-19 GB GB856556A patent/GB801106A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3634088A (en) * | 1970-02-02 | 1972-01-11 | Eastman Kodak Co | Regeneration of blix solutions used in photographic processing |
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