US2138486A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2138486A US2138486A US55412A US5541235A US2138486A US 2138486 A US2138486 A US 2138486A US 55412 A US55412 A US 55412A US 5541235 A US5541235 A US 5541235A US 2138486 A US2138486 A US 2138486A
- Authority
- US
- United States
- Prior art keywords
- alkali
- photographic developer
- developer
- carbohydrates
- sugar
- 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 - Lifetime
Links
- 239000003513 alkali Substances 0.000 description 13
- 239000003518 caustics Substances 0.000 description 9
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Chemical compound OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 7
- 150000001720 carbohydrates Chemical class 0.000 description 7
- 235000014633 carbohydrates Nutrition 0.000 description 7
- 229940077731 carbohydrate nutrients Drugs 0.000 description 5
- 239000000126 substance Substances 0.000 description 4
- NAOLWIGVYRIGTP-UHFFFAOYSA-N 1,3,5-trihydroxyanthracene-9,10-dione Chemical compound C1=CC(O)=C2C(=O)C3=CC(O)=CC(O)=C3C(=O)C2=C1 NAOLWIGVYRIGTP-UHFFFAOYSA-N 0.000 description 3
- 238000007792 addition Methods 0.000 description 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- ROBFUDYVXSDBQM-UHFFFAOYSA-N hydroxymalonic acid Chemical compound OC(=O)C(O)C(O)=O ROBFUDYVXSDBQM-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 235000000346 sugar Nutrition 0.000 description 2
- 229930091371 Fructose Natural products 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 229960002737 fructose Drugs 0.000 description 1
- -1 glycerine aldehyde Chemical class 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 159000000011 group IA salts Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229960004793 sucrose Drugs 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 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
- G03C5/38—Fixing; Developing-fixing; Hardening-fixing
- G03C5/383—Developing-fixing, i.e. mono-baths
Definitions
- This invention relates to durable photographic developers andfixer-deyelopers for halide-gelatine-silver emulsions containing the lmown organic reducing agents.
- the present invention is based on the discovery that such developers containing caustic alkali can be protected from atmospheric oxidation to a far greater extent than is possible with the usual additions of sulfite.
- carbohydrates including among others grape sugar (dextrose)
- gain in reducing power when they are treated with alkali this phenomenon being known in 'the Fehling solution.
- Euler and collaborators have recently proved that grape sugar solutions containing caustic alkali possess in a. high degree the property of consuming oxygen from the atmosphere (cf. Zeitschrift fiir physio strige Chemie., 217, pp. 1 et seq.).
- the decomposition of the carbohydrate molecule by the alkali plays an essential part which becomes the more pronounced the higher the alkalinity of the carbohydrate solution is.
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)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT459908X | 1934-12-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2138486A true US2138486A (en) | 1938-11-29 |
Family
ID=3674549
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US55412A Expired - Lifetime US2138486A (en) | 1934-12-31 | 1935-12-20 | Photographic developer |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2138486A (en(2012)) |
| BE (1) | BE413072A (en(2012)) |
| FR (1) | FR801256A (en(2012)) |
| GB (1) | GB459908A (en(2012)) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2603565A (en) * | 1947-01-15 | 1952-07-15 | Polaroid Corp | Photographic film forming image transfer composition |
| US2609295A (en) * | 1947-10-27 | 1952-09-02 | Hartford Nat Bank & Trust Co | Process for discontinuously physically developing latent photographic images |
| US2702244A (en) * | 1952-07-16 | 1955-02-15 | Polaroid Corp | Photographic processes for producing prints by transfer |
| US2901350A (en) * | 1954-10-12 | 1959-08-25 | Goldhammer Jerome Stewart | Combined developers and fixers |
| US3779767A (en) * | 1971-08-20 | 1973-12-18 | Fuji Photo Film Co Ltd | Color photographic developing method and developer therefor |
| US4124391A (en) * | 1976-02-24 | 1978-11-07 | Fuji Photo Film Co., Ltd. | Process for processing color photographic material |
-
0
- BE BE413072D patent/BE413072A/xx unknown
-
1935
- 1935-12-12 GB GB34482/35A patent/GB459908A/en not_active Expired
- 1935-12-16 FR FR801256D patent/FR801256A/fr not_active Expired
- 1935-12-20 US US55412A patent/US2138486A/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2603565A (en) * | 1947-01-15 | 1952-07-15 | Polaroid Corp | Photographic film forming image transfer composition |
| US2609295A (en) * | 1947-10-27 | 1952-09-02 | Hartford Nat Bank & Trust Co | Process for discontinuously physically developing latent photographic images |
| US2702244A (en) * | 1952-07-16 | 1955-02-15 | Polaroid Corp | Photographic processes for producing prints by transfer |
| US2901350A (en) * | 1954-10-12 | 1959-08-25 | Goldhammer Jerome Stewart | Combined developers and fixers |
| US3779767A (en) * | 1971-08-20 | 1973-12-18 | Fuji Photo Film Co Ltd | Color photographic developing method and developer therefor |
| US4124391A (en) * | 1976-02-24 | 1978-11-07 | Fuji Photo Film Co., Ltd. | Process for processing color photographic material |
Also Published As
| Publication number | Publication date |
|---|---|
| FR801256A (fr) | 1936-07-31 |
| GB459908A (en) | 1937-01-18 |
| BE413072A (en(2012)) |
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