GB520753A - Improvements in photographic developers - Google Patents
Improvements in photographic developersInfo
- Publication number
- GB520753A GB520753A GB31432/38A GB3143238A GB520753A GB 520753 A GB520753 A GB 520753A GB 31432/38 A GB31432/38 A GB 31432/38A GB 3143238 A GB3143238 A GB 3143238A GB 520753 A GB520753 A GB 520753A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- meta
- phosphate
- developer
- containing sodium
- 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
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 abstract 3
- 235000019982 sodium hexametaphosphate Nutrition 0.000 abstract 3
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 abstract 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract 2
- 235000011941 Tilia x europaea Nutrition 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 2
- 239000004571 lime Substances 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- ZVNPWFOVUDMGRP-UHFFFAOYSA-N 4-methylaminophenol sulfate Chemical compound OS(O)(=O)=O.CNC1=CC=C(O)C=C1.CNC1=CC=C(O)C=C1 ZVNPWFOVUDMGRP-UHFFFAOYSA-N 0.000 abstract 1
- 150000001447 alkali salts Chemical class 0.000 abstract 1
- 229910021538 borax Inorganic materials 0.000 abstract 1
- XPPKVPWEQAFLFU-UHFFFAOYSA-J diphosphate(4-) Chemical compound [O-]P([O-])(=O)OP([O-])([O-])=O XPPKVPWEQAFLFU-UHFFFAOYSA-J 0.000 abstract 1
- 235000011180 diphosphates Nutrition 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 125000005341 metaphosphate group Chemical group 0.000 abstract 1
- -1 nitrogenous poly-carboxylic acid Chemical class 0.000 abstract 1
- 238000001556 precipitation Methods 0.000 abstract 1
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 abstract 1
- 239000001509 sodium citrate Substances 0.000 abstract 1
- 239000004328 sodium tetraborate Substances 0.000 abstract 1
- ZSJLUXRWRYLWGG-UHFFFAOYSA-N tetramethyl 2,2-diaminoethane-1,1,1,2-tetracarboxylate Chemical compound COC(=O)C(C(C(=O)OC)(C(=O)OC)C(=O)OC)(N)N ZSJLUXRWRYLWGG-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
- G03C5/29—Development processes or agents therefor
- G03C5/305—Additives other than developers
- G03C5/3053—Tensio-active agents or sequestering agents, e.g. water-softening or wetting agents
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEI0059433 | 1937-10-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB520753A true GB520753A (en) | 1940-05-02 |
Family
ID=7195009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31432/38A Expired GB520753A (en) | 1937-10-29 | 1938-10-31 | Improvements in photographic developers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2172216A (enrdf_load_stackoverflow) |
| BE (1) | BE430669A (enrdf_load_stackoverflow) |
| FR (1) | FR844866A (enrdf_load_stackoverflow) |
| GB (1) | GB520753A (enrdf_load_stackoverflow) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| US2979406A (en) * | 1956-04-11 | 1961-04-11 | Gen Aniline & Film Corp | Single powder photographic developers |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2517111A (en) * | 1946-11-14 | 1950-08-01 | Jahoda Edward | Light-sensitive blueprint layer and process of producing the same |
| US2541470A (en) * | 1947-05-28 | 1951-02-13 | Eastman Kodak Co | Photographic silver halide developing solutions containing calcium precipitation inhibitors |
| US2666700A (en) * | 1950-09-06 | 1954-01-19 | Du Pont | Process of preparing a light sensitive silver halide emulsion |
| US2860978A (en) * | 1954-04-01 | 1958-11-18 | Eastman Kodak Co | Photographic washing accelerators |
| US4340665A (en) * | 1981-03-04 | 1982-07-20 | E. I. Du Pont De Nemours And Company | Silver halide film |
| US4816384A (en) * | 1986-10-09 | 1989-03-28 | E. I. Du Pont De Nemours And Company | Powdered packaged developer |
-
0
- BE BE430669D patent/BE430669A/xx unknown
-
1938
- 1938-10-17 FR FR844866D patent/FR844866A/fr not_active Expired
- 1938-10-27 US US237281A patent/US2172216A/en not_active Expired - Lifetime
- 1938-10-31 GB GB31432/38A patent/GB520753A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| US2979406A (en) * | 1956-04-11 | 1961-04-11 | Gen Aniline & Film Corp | Single powder photographic developers |
Also Published As
| Publication number | Publication date |
|---|---|
| US2172216A (en) | 1939-09-05 |
| BE430669A (enrdf_load_stackoverflow) | |
| FR844866A (fr) | 1939-08-03 |
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