US2172216A - Photographic developer - Google Patents
Photographic developer Download PDFInfo
- Publication number
- US2172216A US2172216A US237281A US23728138A US2172216A US 2172216 A US2172216 A US 2172216A US 237281 A US237281 A US 237281A US 23728138 A US23728138 A US 23728138A US 2172216 A US2172216 A US 2172216A
- Authority
- US
- United States
- Prior art keywords
- salts
- developer
- acid
- lime
- photographic developer
- 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
- 239000002253 acid Substances 0.000 description 11
- 150000003839 salts Chemical class 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 239000000203 mixture Substances 0.000 description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 7
- 235000011941 Tilia x europaea Nutrition 0.000 description 7
- 239000004571 lime Substances 0.000 description 7
- 150000007513 acids Chemical class 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 229910019142 PO4 Inorganic materials 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 235000011180 diphosphates Nutrition 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 244000144992 flock Species 0.000 description 2
- 235000021317 phosphate Nutrition 0.000 description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000766754 Agra Species 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 108010010803 Gelatin Proteins 0.000 description 1
- 241000124008 Mammalia Species 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- -1 alkali metal salts Chemical class 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229960001948 caffeine Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 159000000007 calcium salts Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 125000005341 metaphosphate group Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical group 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 229940001593 sodium carbonate Drugs 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229940001482 sodium sulfite Drugs 0.000 description 1
- 235000010265 sodium sulphite Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RYYVLZVUVIJVGH-UHFFFAOYSA-N trimethylxanthine Natural products CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 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
- G03C5/29—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
Definitions
- the present invention relates to photographic developers and more particularly to developers comprising additions which prevent the precipitation of lime salts from the solutio It has been proposed to prevent the precipitathe concentrated developing solutions or also to 6 tion of lime salts from photographic solutions, e'sthe commercial dry mixtures of the development pecially developers, which have a considerable chemicals. content of salt and which have been prepared
- the following examples serve to illustrate the with water with a high content of calcium by invention without, however, limiting the scope adding to the solutions alkali metal-metaor thereof to the specific details set forth therein. 10 ipyro-phosphates.
- Example 1 11 solutions which are subjected to prolonged use for instance in tank developers: after a certain To a developer of the following composition' time separation of flocks occurs which is probably 1'methylammo'hydmxybenzenesulfate due to a slow decomposition of the phosphates 15 and to the precipitating action of gelatin parsodiumsulfite cryst 40 ticles which may get into the tank developer Sodiumcarbonati 20 during development.
- the flocculation of mm Potassium bmmlde sediments from the solutions can of course be Water 7""7 1000 avoided permanently by the addition of aliphatic there are added either in solution or to the solid nitrogen containing polycarboxylic acids or salts mlxture of mammals grams of thereof.
- polycarboxylic acids of this kind are metaphosphate and 2.5 grams of trlmethylamine for instance described in Annalen, 122, pages trica'rboxy 11c acid I 269 and 276, and Annalen, 278, pages 231 and Example 2 234, furthermore in the German Patent No. A developer t e foll w OOmPOSitIOHZ 638,071 and in the French Patent No. 804,497.
- the Potfi'ssium bromlde action of the mixture is not merely aggregative Sodmm salt of citric acid 3 45 but the co-operation of the two additions results in there a e ad d 2 grams of Sodium e ametaan improvement of high practical importance P o p at and 2 grams 6t y since it appears that the presence of the aliphatic diethylamine-dicarboxylic acid.
- the denitrogen containing polycarboxylic acids and veloper must be dissolved in 1000 cc. of water. their salts prevent the formation of decomposi- I claim: 60 tion products from metaor'pyrophosphates and A photographic developer comprising a dethereby the formation of flocks.
- an efiective amount of an alkali It is possible to employ the compounds in quesmetal salt of an acid selected from the group contion in the form of their free acids or as soluble 'sisting of meta-phosphoric acid and pyrophossalts, especially as alkali metal salts.
- the phoric acid and an eifective amount of an amounts which have to be employed depend upon the composition of the developer per se and of course also on the lime content of the water. used for dilution or solution.
- the mixtures of metaor pyrophosphates and aliphatic nitrogenous poly.. carboxylic acids and their salts may be added to aliphatic nitrogen containing polycarboxylic acid.
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 |
|---|---|
| US2172216A true US2172216A (en) | 1939-09-05 |
Family
ID=7195009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US237281A Expired - Lifetime US2172216A (en) | 1937-10-29 | 1938-10-27 | Photographic developer |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2172216A (en(2012)) |
| BE (1) | BE430669A (en(2012)) |
| FR (1) | FR844866A (en(2012)) |
| GB (1) | GB520753A (en(2012)) |
Cited By (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 |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| 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 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666700A (en) * | 1950-09-06 | 1954-01-19 | Du Pont | Process of preparing a light sensitive silver halide emulsion |
| US2979406A (en) * | 1956-04-11 | 1961-04-11 | Gen Aniline & Film Corp | Single powder photographic developers |
-
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 (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 |
| US2657138A (en) * | 1950-01-03 | 1953-10-27 | Leonard A Robbins | Photographic film developing composition containing beta, beta'-di-chloroethyl ether |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| BE430669A (en(2012)) | |
| FR844866A (fr) | 1939-08-03 |
| GB520753A (en) | 1940-05-02 |
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