US2739894A - Single powder photographic developers containing lithium hydroxide - Google Patents
Single powder photographic developers containing lithium hydroxide Download PDFInfo
- Publication number
- US2739894A US2739894A US420463A US42046354A US2739894A US 2739894 A US2739894 A US 2739894A US 420463 A US420463 A US 420463A US 42046354 A US42046354 A US 42046354A US 2739894 A US2739894 A US 2739894A
- Authority
- US
- United States
- Prior art keywords
- sodium
- lithium hydroxide
- single powder
- developer
- mixture
- 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
- 239000000843 powder Substances 0.000 title claims description 50
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 title description 38
- 239000000203 mixture Substances 0.000 claims description 45
- PQVSTLUFSYVLTO-UHFFFAOYSA-N ethyl n-ethoxycarbonylcarbamate Chemical compound CCOC(=O)NC(=O)OCC PQVSTLUFSYVLTO-UHFFFAOYSA-N 0.000 claims description 22
- GLXDVVHUTZTUQK-UHFFFAOYSA-M lithium hydroxide monohydrate Substances [Li+].O.[OH-] GLXDVVHUTZTUQK-UHFFFAOYSA-M 0.000 claims description 22
- 229940040692 lithium hydroxide monohydrate Drugs 0.000 claims description 22
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 12
- -1 SILVER HALIDE Chemical class 0.000 claims description 11
- 229910052709 silver Inorganic materials 0.000 claims description 9
- 239000004332 silver Substances 0.000 claims description 9
- VGTPKLINSHNZRD-UHFFFAOYSA-N oxoborinic acid Chemical compound OB=O VGTPKLINSHNZRD-UHFFFAOYSA-N 0.000 claims description 6
- HRZFUMHJMZEROT-UHFFFAOYSA-L sodium disulfite Chemical compound [Na+].[Na+].[O-]S(=O)S([O-])(=O)=O HRZFUMHJMZEROT-UHFFFAOYSA-L 0.000 claims description 6
- 229940001584 sodium metabisulfite Drugs 0.000 claims description 6
- 235000010262 sodium metabisulphite Nutrition 0.000 claims description 6
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 claims description 5
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 claims description 5
- DJEHXEMURTVAOE-UHFFFAOYSA-M potassium bisulfite Chemical compound [K+].OS([O-])=O DJEHXEMURTVAOE-UHFFFAOYSA-M 0.000 claims description 3
- 235000010259 potassium hydrogen sulphite Nutrition 0.000 claims description 3
- 235000010267 sodium hydrogen sulphite Nutrition 0.000 claims description 3
- DWAQJAXMDSEUJJ-UHFFFAOYSA-M Sodium bisulfite Chemical compound [Na+].OS([O-])=O DWAQJAXMDSEUJJ-UHFFFAOYSA-M 0.000 claims description 2
- 150000008064 anhydrides Chemical class 0.000 claims description 2
- 229940099427 potassium bisulfite Drugs 0.000 claims description 2
- RWPGFSMJFRPDDP-UHFFFAOYSA-L potassium metabisulfite Chemical compound [K+].[K+].[O-]S(=O)S([O-])(=O)=O RWPGFSMJFRPDDP-UHFFFAOYSA-L 0.000 claims description 2
- 229940043349 potassium metabisulfite Drugs 0.000 claims description 2
- 235000010263 potassium metabisulphite Nutrition 0.000 claims description 2
- 229940001607 sodium bisulfite Drugs 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 18
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 18
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 9
- 238000002845 discoloration Methods 0.000 description 9
- 235000013350 formula milk Nutrition 0.000 description 9
- 229940001482 sodium sulfite Drugs 0.000 description 9
- 235000010265 sodium sulphite Nutrition 0.000 description 9
- 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 8
- 229910021538 borax Inorganic materials 0.000 description 8
- 150000001875 compounds Chemical class 0.000 description 8
- 239000011734 sodium Substances 0.000 description 8
- 229910052708 sodium Inorganic materials 0.000 description 8
- 235000010339 sodium tetraborate Nutrition 0.000 description 8
- JAKYJVJWXKRTSJ-UHFFFAOYSA-N sodium;oxido(oxo)borane;tetrahydrate Chemical compound O.O.O.O.[Na+].[O-]B=O JAKYJVJWXKRTSJ-UHFFFAOYSA-N 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- 239000002253 acid Substances 0.000 description 6
- 239000003513 alkali Substances 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 235000019441 ethanol Nutrition 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 235000020610 powder formula Nutrition 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 description 4
- 239000004328 sodium tetraborate Substances 0.000 description 4
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- UCDDIWXMVLDWSE-UHFFFAOYSA-N B(O)(O)O.O.O.O.O.O Chemical compound B(O)(O)O.O.O.O.O.O UCDDIWXMVLDWSE-UHFFFAOYSA-N 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- STNGULMWFPMOCE-UHFFFAOYSA-N ethyl 4-butyl-3,5-dimethyl-1h-pyrrole-2-carboxylate Chemical compound CCCCC1=C(C)NC(C(=O)OCC)=C1C STNGULMWFPMOCE-UHFFFAOYSA-N 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 150000004685 tetrahydrates Chemical class 0.000 description 2
- KQTIIICEAUMSDG-UHFFFAOYSA-N tricarballylic acid Chemical compound OC(=O)CC(C(O)=O)CC(O)=O KQTIIICEAUMSDG-UHFFFAOYSA-N 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- CYXJEHCKVOQFOV-UHFFFAOYSA-N (4-amino-2-methylphenyl) hydrogen sulfate Chemical compound CC1=CC(N)=CC=C1OS(O)(=O)=O CYXJEHCKVOQFOV-UHFFFAOYSA-N 0.000 description 1
- RVGOBWDGAVAVPJ-UHFFFAOYSA-N (4-hydroxyphenyl)azanium;chloride Chemical compound Cl.NC1=CC=C(O)C=C1 RVGOBWDGAVAVPJ-UHFFFAOYSA-N 0.000 description 1
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 description 1
- HDZHNYWSJFVZIO-UHFFFAOYSA-N 2,3-diaminophenol;hydrochloride Chemical compound Cl.NC1=CC=CC(O)=C1N HDZHNYWSJFVZIO-UHFFFAOYSA-N 0.000 description 1
- UERPUZBSSSAZJE-UHFFFAOYSA-N 3-chlorophthalic anhydride Chemical compound ClC1=CC=CC2=C1C(=O)OC2=O UERPUZBSSSAZJE-UHFFFAOYSA-N 0.000 description 1
- PXRKCOCTEMYUEG-UHFFFAOYSA-N 5-aminoisoindole-1,3-dione Chemical compound NC1=CC=C2C(=O)NC(=O)C2=C1 PXRKCOCTEMYUEG-UHFFFAOYSA-N 0.000 description 1
- KLWFHXWZHQXGNU-UHFFFAOYSA-N C1(C=2C(C(=O)O1)=CC=CC2)=O.[Cl] Chemical compound C1(C=2C(C(=O)O1)=CC=CC2)=O.[Cl] KLWFHXWZHQXGNU-UHFFFAOYSA-N 0.000 description 1
- WRUZLCLJULHLEY-UHFFFAOYSA-N N-(p-hydroxyphenyl)glycine Chemical compound OC(=O)CNC1=CC=C(O)C=C1 WRUZLCLJULHLEY-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- HZRMTWQRDMYLNW-UHFFFAOYSA-N lithium metaborate Chemical compound [Li+].[O-]B=O HZRMTWQRDMYLNW-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229940094035 potassium bromide Drugs 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 239000000837 restrainer Substances 0.000 description 1
- RBWOKKSOBWYZQH-UHFFFAOYSA-N s-octyl benzenecarbothioate Chemical compound CCCCCCCCSC(=O)C1=CC=CC=C1 RBWOKKSOBWYZQH-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- ZCXUWYGUGJQPPR-UHFFFAOYSA-N trisodium;borate;pentahydrate Chemical compound O.O.O.O.O.[Na+].[Na+].[Na+].[O-]B([O-])[O-] ZCXUWYGUGJQPPR-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
- G03C5/264—Supplying of photographic processing chemicals; Preparation or packaging thereof
- G03C5/265—Supplying of photographic processing chemicals; Preparation or packaging thereof of powders, granulates, tablets
Definitions
- This invention relates to photographic developer compositions the components of which are mutually compatible and can, therefore, be packaged for merchandising as a mixture in a hermetically sealed package.
- photographic developer mixtures are commonly known as single-powder photographic developers, and the present invention more particularly relates to single powder developers containing lithium hydroxide monohydrate as an alkali component of the single powder developer.
- photographic developer powders have traditionally been packaged with the developing agents separated from the alkaline components to prevent interaction. More recently it has been disclosed that some developer mixtures may be protected by the addition of certain protectants so that the developing agents may be mixed directly with the other components of the developer and the resulting developer mixture can be packaged as a single powder developer.
- Such single powder developers may contain, for example, an organic developing agent such as monomethyl p-aminophenol sulfate, hydroquinone, p-aminophenol hydrochloride, p-aminophenol sulfate, pyrogallol, p-hydroxyphenyl glycine, catechol, diaminophenol hydrochloride, and suitable mixtures thereof, stable alkaline butler salts such as sodium carbonate monohydrate, sodium metaborate tetrahydrate (NazB2O4.4H2O) and sodium tetraborate pentahydrate (NEIZBaO'LSHZO); and protectants such as boric anhydride, metaboric acid, phthalic anhydride and sodium or potassium bisulfites and metabisulfites and may also contain the other well known ingredients normally present in a developer such as sodium sulfite and potassium bromide, the normal and known function of the alkali sulfite being that of preservative, lessening the oxidation
- potassium bromide is that of a inhibiting fog silver image.
- Another object of this invention is to provide single powder developers containing lithium hydroxide from which developing solutions which are colorless, fully balanced and of a proper degree of activity can be prepared.
- Another object of this invention is to provide a noncaking single powder developer containing lithium hydroxide monohydrate.
- a further object of the invention is to provide a single powder photographic developer containing lithium hydroxide monohydrate and one or more protectant compounds to prevent interaction of the organic developing agents and the alkaline components and thereby prevent deterioration of the single powder developer.
- Lithium hydroxide monohydrate is also compatible with alum hardening and fixingbaths which may be used after development. v
- lithium hydroxide monohydrate is readily soluble in water yet it absorbs little moisture from the atmosphere. Since its surface is, therefore, relatively dry it is very suitable for admixture into single powder developers under normal conditions of temperature and humidity.
- protectants which may be satisfactorily employed in single powder developers containing lithium hydroxide include boric anhydride, metaboric acid, phthalic anhydride, chlor phthalic anhydride, sodium and potassium' bisulfites and metabisulfites. These protectants may be employed singularly and in various mixtures. Certain mixtures of the protectants have been found'advantageous for use in single powder developers containing certain alkali components.
- This example illustrates the uses of lithium hydroxide monohydrate in a single powder mixture as' an addend to increase activity by increasing the alkalinity of the formula.
- This single powder mixture did not discolor or otherwise deteriorate when incubated at F. for
- lithium hydroxide monohydrate having slightly more than the theoretical amount of water of ciystallization (56.2% lithium hydroxide, 43.8% water) or slightly less than the theoretical amount (58.0% lithium hydroxide, 42.0% water) did cause discoloration when stored under the same conditions.
- the lithium hydroxide having the optimum amount of water of crystallization was also employed in the following examples.
- lithium hydroxide in the formula did not affect the stability of the powders which remained free of discoloration on storage.
- the sodium metaborate used in the above formula was prepared by drying the tetrahydrate. form ofthe compoundby heating it, after previously having treated it with carbon dioxide gas. This treatment increases the stability of the compound in that it inhibits the discoloration reaction that would normally occur if the tetrahydrate
- the use of lithium hydroxide in the formula. did: not affect the stability of the powders which remained free of discoloration on storage.
- the sodium metaborate-boric anhydride blend. was prepared. by heating the mixture for 4 hours at 70 C.v This treatment stabilizes the sodium metaborate. in such away as. to make it suitable for use in single powder formulas.
- the sodium metaborate-metaboric acid blend was prepared by heating the mixture for 4 hours at 70 C. This treatment stabilizes the sodium metaborate in such a way as to make it suitable for use in single powder for. mulas.
- example and Examples 2 and 3 serve to illustrat the use of lithium hydroxide as an addend to single powder formulas to balance the acidic eifect of thevarious combinations of compounds used toprevent discoloration and deterioration of the powders and thus to preserve the photographic properties of the formulas.
- Example 5 Gram Elon 2.0. Hydroquinone 4.0 Sodium sulfite 22.5 Anhydrous sodium tetraborate (finely ground) 14.7 Lithium hydroxide monohydrate 7 .6 Potassium bromide 2.0. Boric anhydride 1.2
- This example serves to illustrate the use of lithium hydroxide as an addendto a single powder. formula to supplement the alkalinity of sodium tetraborate, without affecting the stability of the powders.
- This example serves to illustrate. the use of lithium 'hydroxide in substitution for sodium hydroxide in high energy formulas making it possible to pack the formula. as a single powder.
- This example serves to illustrate the use of lithium hydroxide as an addend to a single powder formula to. supplement the alkalinity of sodium borate without affect! ing the stability of the powders.
- This formula also has the advantage of greater solubility over thatgiven in Eas ample 5 because of the greater ease of. solution of the hydrated form of sodium borate as compared to the anhydrous form.
- compositionsshown in the examples should be dissolved in. water to make one liter of solution.
- Example 8 58.2 grams (0.2 mole) of sodium borate pentahydraite was intimately mixed with 22.4 grams (0.53 mole) of lithium hydroxide monohydrate and the mixture heated;
- Still another method of treating sodium metaborate so that it is compatible in single powder developer mixtures is to stabilize it by washing with a solution of an organic acid in an alcohol.
- Sodium metaborate tetrahydrate can be suitably stabilized by washing in a 5% solution of citric acid in denatured ethyl alcohol so that it can be packed in a single powder developer containing a low concentration of boric anhydride as protectant. Without this treatment, protectant concentrations 5 to 10 times higher are necessary to obtain an equivalent protection against deterioration.
- the preferred procedure of treatment requires that the sodium metaborate tetrahydrate be added to the acidsolvent solution in a ratio of 1000 grams of the metaborate compound to 1 liter of solution. The mixture is stirred thoroughly and the compound filtered off. The compound is then heated mildly to remove absorbed solvent. Best results are obtained when the solvent is anhydrous. It is necessary to remove nearly' all of the absorbed solvent from the treated product to obtain maximum stability.
- the choice of acid and solvent is not limited to any particular group.
- the basic requirements are that the acid be reasonably soluble in the solvent chosen and that the solvent does not excessively dissolve sodium metaborate tetrahydrate. There are, however, some combinations of acid and solvent that are much more effective than others.
- Example 9 Using sodium metaborate tetrahydrate treated with a solution of 5% citric, malic or tricarballylic acid in dc natured ethyl alcohol the following single powder was prepared:
- the powder showed no objectionable discoloration after being stored for one week at F.
- developing agent in the claims is to be interpreted as comprising either one or several separate organic developer compounds.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, lithium hydroxide monohydrate and a stabilizing agent selected from the group consisting of boric anhydride, metaboric acid, phthalic anhydride, chlorphthalic anhydride, sodium bisulfite, potassium bisulfite, sodium metabisulfite and potassium metabisulfite.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, sodium carbonate monohydrate, potassium bromide, boric anhydride and lithium hydroxide monohydrate.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, sodium metaborate trihydrate, CO2 treated, potassium bromide, boric anhydride, sodium metabisulfite and lithium hydroxide monohydrate.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, sodium metaborate tetrahydrate containing 10% metaboric acid, potassium bromide, phthalic anhydride, sodium metabisulfite and lithium hydroxide monohydrate.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, anhydrous sodium tetraborate, boric anhydride and lithium hydroxide monohydrate.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, boric anhydride and lithium hydroxide monohydrate.
- a stable single powder photographic developer composition containing a mixture of an organic silver halide developer, sodium sulfite, sodium borate pentahydrate, boric anhydride and lithium hydroxide monohydrate.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE536991D BE536991A (en(2012)) | 1954-04-01 | ||
| US420463A US2739894A (en) | 1954-04-01 | 1954-04-01 | Single powder photographic developers containing lithium hydroxide |
| GB8457/55A GB766101A (en) | 1954-04-01 | 1955-03-23 | Improvements in photographic developer compositions |
| FR1131909D FR1131909A (fr) | 1954-04-01 | 1955-04-01 | Nouveau révélateur photographique en une seule poudre et nouveau produit pour sa préparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US420463A US2739894A (en) | 1954-04-01 | 1954-04-01 | Single powder photographic developers containing lithium hydroxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2739894A true US2739894A (en) | 1956-03-27 |
Family
ID=23666584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US420463A Expired - Lifetime US2739894A (en) | 1954-04-01 | 1954-04-01 | Single powder photographic developers containing lithium hydroxide |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2739894A (en(2012)) |
| BE (1) | BE536991A (en(2012)) |
| FR (1) | FR1131909A (en(2012)) |
| GB (1) | GB766101A (en(2012)) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2893865A (en) * | 1956-12-26 | 1959-07-07 | Gen Aniline & Film Corp | Single powder photographic developers |
| US3236650A (en) * | 1962-09-06 | 1966-02-22 | Limberger Walter | Method for developing films |
| US5780211A (en) * | 1991-05-01 | 1998-07-14 | Konica Corporation | Processing composition in the tablet form for silver halide photographic light-sensitive material |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2366496A (en) * | 1941-04-16 | 1945-01-02 | Du Pont | Stabilized concentrated photographic developing compositions |
| US2384592A (en) * | 1943-04-22 | 1945-09-11 | Eastman Kodak Co | Single-powder photographic developers |
| US2606118A (en) * | 1951-02-09 | 1952-08-05 | Eastman Kodak Co | Stabilizing agent for single powder photographic developers |
| US2649376A (en) * | 1952-06-26 | 1953-08-18 | Eastman Kodak Co | Single powder developers containing stabilized alkali hydroxides |
| US2666703A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single-powder photographic developers stabilized with metaboric acid |
| US2666702A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single powder photographic developers having improved stability to high temperatures |
-
0
- BE BE536991D patent/BE536991A/xx unknown
-
1954
- 1954-04-01 US US420463A patent/US2739894A/en not_active Expired - Lifetime
-
1955
- 1955-03-23 GB GB8457/55A patent/GB766101A/en not_active Expired
- 1955-04-01 FR FR1131909D patent/FR1131909A/fr not_active Expired
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2366496A (en) * | 1941-04-16 | 1945-01-02 | Du Pont | Stabilized concentrated photographic developing compositions |
| US2384592A (en) * | 1943-04-22 | 1945-09-11 | Eastman Kodak Co | Single-powder photographic developers |
| US2606118A (en) * | 1951-02-09 | 1952-08-05 | Eastman Kodak Co | Stabilizing agent for single powder photographic developers |
| US2649376A (en) * | 1952-06-26 | 1953-08-18 | Eastman Kodak Co | Single powder developers containing stabilized alkali hydroxides |
| US2666703A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single-powder photographic developers stabilized with metaboric acid |
| US2666702A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single powder photographic developers having improved stability to high temperatures |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2893865A (en) * | 1956-12-26 | 1959-07-07 | Gen Aniline & Film Corp | Single powder photographic developers |
| US3236650A (en) * | 1962-09-06 | 1966-02-22 | Limberger Walter | Method for developing films |
| US5780211A (en) * | 1991-05-01 | 1998-07-14 | Konica Corporation | Processing composition in the tablet form for silver halide photographic light-sensitive material |
Also Published As
| Publication number | Publication date |
|---|---|
| BE536991A (en(2012)) | |
| GB766101A (en) | 1957-01-16 |
| FR1131909A (fr) | 1957-03-01 |
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