US2606118A - Stabilizing agent for single powder photographic developers - Google Patents
Stabilizing agent for single powder photographic developers Download PDFInfo
- Publication number
- US2606118A US2606118A US210284A US21028451A US2606118A US 2606118 A US2606118 A US 2606118A US 210284 A US210284 A US 210284A US 21028451 A US21028451 A US 21028451A US 2606118 A US2606118 A US 2606118A
- Authority
- US
- United States
- Prior art keywords
- grams
- developer
- anhydride
- powder
- alkali
- 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 29
- 239000003381 stabilizer Substances 0.000 title claims description 15
- 239000000203 mixture Substances 0.000 claims description 27
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 claims description 24
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 7
- 239000004332 silver Substances 0.000 claims description 7
- -1 SILVER HALIDE Chemical class 0.000 claims description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical compound [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 claims description 3
- 150000001642 boronic acid derivatives Chemical class 0.000 claims description 2
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 34
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 26
- 239000003513 alkali Substances 0.000 description 25
- 229940001482 sodium sulfite Drugs 0.000 description 14
- 235000010265 sodium sulphite Nutrition 0.000 description 14
- MQRJBSHKWOFOGF-UHFFFAOYSA-L disodium;carbonate;hydrate Chemical compound O.[Na+].[Na+].[O-]C([O-])=O MQRJBSHKWOFOGF-UHFFFAOYSA-L 0.000 description 13
- 229940094035 potassium bromide Drugs 0.000 description 13
- 229940076133 sodium carbonate monohydrate Drugs 0.000 description 12
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 11
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 11
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 11
- 150000008064 anhydrides Chemical class 0.000 description 8
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 6
- 229940101006 anhydrous sodium sulfite Drugs 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 5
- YCIMNLLNPGFGHC-UHFFFAOYSA-N catechol Chemical compound OC1=CC=CC=C1O YCIMNLLNPGFGHC-UHFFFAOYSA-N 0.000 description 4
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Inorganic materials [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 4
- HDZHNYWSJFVZIO-UHFFFAOYSA-N 2,3-diaminophenol;hydrochloride Chemical compound Cl.NC1=CC=CC(O)=C1N HDZHNYWSJFVZIO-UHFFFAOYSA-N 0.000 description 3
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 229940001593 sodium carbonate Drugs 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- NVIFVTYDZMXWGX-UHFFFAOYSA-N sodium metaborate Chemical compound [Na+].[O-]B=O NVIFVTYDZMXWGX-UHFFFAOYSA-N 0.000 description 3
- RVGOBWDGAVAVPJ-UHFFFAOYSA-N (4-hydroxyphenyl)azanium;chloride Chemical compound Cl.NC1=CC=C(O)C=C1 RVGOBWDGAVAVPJ-UHFFFAOYSA-N 0.000 description 2
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 2
- WRUZLCLJULHLEY-UHFFFAOYSA-N N-(p-hydroxyphenyl)glycine Chemical compound OC(=O)CNC1=CC=C(O)C=C1 WRUZLCLJULHLEY-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- JYYOBHFYCIDXHH-UHFFFAOYSA-N carbonic acid;hydrate Chemical compound O.OC(O)=O JYYOBHFYCIDXHH-UHFFFAOYSA-N 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- RBWOKKSOBWYZQH-UHFFFAOYSA-N s-octyl benzenecarbothioate Chemical compound CCCCCCCCSC(=O)C1=CC=CC=C1 RBWOKKSOBWYZQH-UHFFFAOYSA-N 0.000 description 2
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- NOGFHTGYPKWWRX-UHFFFAOYSA-N 2,2,6,6-tetramethyloxan-4-one Chemical compound CC1(C)CC(=O)CC(C)(C)O1 NOGFHTGYPKWWRX-UHFFFAOYSA-N 0.000 description 1
- LJCWONGJFPCTTL-UHFFFAOYSA-N 4-hydroxyphenylglycine Chemical compound OC(=O)C(N)C1=CC=C(O)C=C1 LJCWONGJFPCTTL-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 239000012964 benzotriazole Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 229910021538 borax Inorganic materials 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical compound BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000002939 deleterious effect Effects 0.000 description 1
- WBZKQQHYRPRKNJ-UHFFFAOYSA-L disulfite Chemical compound [O-]S(=O)S([O-])(=O)=O WBZKQQHYRPRKNJ-UHFFFAOYSA-L 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 description 1
- XKJCHHZQLQNZHY-UHFFFAOYSA-N phthalimide Chemical compound C1=CC=C2C(=O)NC(=O)C2=C1 XKJCHHZQLQNZHY-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229960004839 potassium iodide Drugs 0.000 description 1
- 235000007715 potassium iodide Nutrition 0.000 description 1
- LMQVOTBDGNFPAS-UHFFFAOYSA-L potassium sodium hydrogen carbonate bromide hydrate Chemical compound O.C([O-])(O)=O.[Na+].[Br-].[K+] LMQVOTBDGNFPAS-UHFFFAOYSA-L 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- 239000000837 restrainer Substances 0.000 description 1
- 229960004889 salicylic acid Drugs 0.000 description 1
- 239000004328 sodium tetraborate Substances 0.000 description 1
- 235000010339 sodium tetraborate Nutrition 0.000 description 1
- 230000002277 temperature effect Effects 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
- (01. 95-38) 1 relates to This invention single-powder photographic developers, and more particularly to a single-powder developer in which the ingredients of the developer are intimately mixed in the form of dry powder with powdered boric anhydride, which contains free moisture not in excess of 15.0% by weight, as a stabilizing agent to prevent disadvantageous interaction between the organic developer component-and the basic component of the single-powder mixture.
- Single-powder developer mixtures may contain an organic developer component or mixtures of such components, including monomethylparaminophenol sulfate (elon or metol), hydroquinone, p-aminophenol hydrochloride, p-aminophenol sulfate, pyrogallol, parahydroxyphenyl glycine, catechol, diaminophenol hydrochloride, and others, with an alkali component, a stabilizing component, an oxidizing preventer and an anti-fogging component.
- the alkali component may be the stable hydrate of an alkali carbonate, a desiccated alkali carbonate, an alkali metaborate, or an alkali sulfite.
- the oxidation preventing component may be an alkali sulfite
- the anti-fogging component may be potassium bromide or iodide.
- Stabilizing components for such a single-powder developer include maleic anhydride, salicylic acid, alkali metabisulfite, benzoic anhydride, orthobenzoic sulfimide, phthalimide, and phthalic anhydride. The latter has outstanding stabilizing properties in the presence of either sodium carbonate or borax and has been employed considerably more than the other stabilizers mentioned in the patent.
- phthalic anhydride While the stabilizing effect of the phthalic anhydride is verygood, it has been employed most successfully in developer compositions having as the alkali component either sodium carbonate or sodium sulfite, or mixtures thereof. Less success has been attained in the case ofthe important class of developers containing sodium metaborate as the alkali ingredient. Also, the presence of phthalic anhydride in the singlepowder developer involves other considerations which are not too desirable. In the first place, phthalic anhydride is slowly soluble in water. Furthermore, it is impossible to employ it in the presence of benzotriazole, the latter being a desirable component of certain developer mixtures.
- phthalic anhydride in single-powder developer mixtures, which contain alkali carbonates and sulfite, is that phthalic anhydride may react due in part to temperature effects with these basic substances and form gas under sufficient pressure to distend the hermetically sealed can in which the developer powder is packaged, and often cause a portion of the powder to be ejected with some violence as the package is opened.
- An. object, therefore, of the presentinvention is to provide an improved stabilizing agent for single-powder developers.
- Another object of the invention is to provide an improved stabilizing agent for single-powder developers which does not possess the disadvantages caused by employing phthalic anhydride as the stabilizing agent.
- a further object of the invention is to provide an improved stabilizing agent which makes possible the production of single-powder developers having improved stabilizing characteristics containing as the alkali ingredient, sodium metaborate.
- boric anhydride as the stabilizer instead of other previously known stabilizers in such single-powder developers which contain both organic developer components and basic components.
- the boric anhydride employed in accordance with my invention may contain free moisture up to 15.0% by weight and when the term boric anhydride is mentioned in this specification I mean boric anhydride with a moisture content within this range.
- bori'c anhydride eliminates the objectionable characteristics possessed by phthalic anhydride. It appears that boric anhydride being much less acid than phthalic anhydride does not react as easily or as violently as phthalic anhydride with alkali carbonates or alkali sulfites such as NazCOa and NazSOx. In this respect it is noted that the pH of phthalic anhydride is about 2.4 while the pH of boric anhydride is about 5.4 at 3 concentrations. Borio anhydride is admirably suited as a stabilizer and has the characteristics required for a stabilizer. It is acidic, relatively colorless, odorless, and stable and has no deleterious action photographically.
- a preferred embodiment of the present invention involves the use in the single-powder photographic developer mixture of either the stable hydrate of an alkali carbonate or also a desiccated alkali carbonate.
- the alkali carbonate hydrate appears to be more stable in the presence .lmage.
- diaminophenol hydrochloride and suitable mix-- tures thereof, a stable alkali carbonate, such as sodium carbonate monohydrate; and boric anhydride, and may contain the other well known ingredients normally present in a developer, such .as sodium sulfite and potassium bromide, the
- Example 4 I Grams -Elon 2.5 Anhydroussodium sulfite 30.0 .Hydroquinone ⁇ 2.5 Sodium metaborate 10.5 ,PQtassium brom d I05 Bone "anhydride ;l.; '41?
- Example 5 r I Grams Sodium sulfite 50 Sodium carbonate monohydrate 54 Potassium bromide 1 B'oric anhydride QQ 2.2 Pyroga1lol' 6.3
- Example 10 I II II Grams Sodium sulfite 'I I IL 75 Sodium carbonate monohydrate 30 Potassiumiodide .01 ,Bo'ric anhydride 2.2 ,Hy'droquinone 9 Elon' 1
- Example 11 r II I II I Grams Elon 10.0 Anhydrous sodium sulfite 100.0 .Sodiumxnetaborate 20.0 Boric anhydride 4.0
- Example 12 w Elon "5; Sodium sulfite, desiccated "100.0 Boric anhydride 1.1
- a stable single-powder photographic developer composition containing an organic silver halide developer, a stabilizing agent, comprising boric anhydride having free moisture content not exceeding approximately 15.0% by weight and a soluble, stable, and photographically compatible basic ingredient selected from the group consisting of alkali borates, sulfites and carbonates.
- a stable single-powder photographic developer composition containing an organic silver halide developer, sodium carbonate monohydrate, and boric anhydride containing less than 15.0% free moisture.
- a stable single-powder photographic developer containing an organic silver halide developer, an anhydrous alkali carbonate, an alkali sulfite and boric anhydride containing less than 15.0 by weight of free moisture.
- a stable single-powder photographic developer composition containing an organic silver by weight of free moisture and 8.4 grams p-hydroxyphenyl glycine.
- a stable single-powder photographic developer composition consisting of approximately 50 grams sodium sulfite, 54 grams sodium carbonate monohydrate, 1 gram potassium bromide, 1.1 grams boric anhydride containing less than 15.0% by weight of free moisture and 7.3 grams paminophenol hydrochloride.
- a stable single-powder photographic developer composition consisting of approximately 3.1 grams monomethyl p-aminosulfate, 12 grams hydroquinone, grams anhydrous sodium sulfite, 81 grams sodium carbonate monohydrate, 1.9 grams potassium bromide, and 4.2 grams boric anhydride containing less than 15.0% by weight of free moisture.
- a stable single-powder photographic developer composition consisting of approximately 59 grams sodium sulfite, 3.2 grams potassium bromide, 34.6 grams diaminophenol hydrochloride and 2.9 grams boric anhydride containing less than 15.0% by Weight of free moisture.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE509125D BE509125A (en(2012)) | 1951-02-09 | ||
| US210284A US2606118A (en) | 1951-02-09 | 1951-02-09 | Stabilizing agent for single powder photographic developers |
| FR1050242D FR1050242A (fr) | 1951-02-09 | 1952-02-05 | Révélateur photographique |
| GB3521/52A GB698311A (en) | 1951-02-09 | 1952-02-11 | Improvements in single powder photographic developers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US210284A US2606118A (en) | 1951-02-09 | 1951-02-09 | Stabilizing agent for single powder photographic developers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US2606118A true US2606118A (en) | 1952-08-05 |
Family
ID=22782310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US210284A Expired - Lifetime US2606118A (en) | 1951-02-09 | 1951-02-09 | Stabilizing agent for single powder photographic developers |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2606118A (en(2012)) |
| BE (1) | BE509125A (en(2012)) |
| FR (1) | FR1050242A (en(2012)) |
| GB (1) | GB698311A (en(2012)) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666702A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single powder photographic developers having improved stability to high temperatures |
| US2666703A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single-powder photographic developers stabilized with metaboric acid |
| US2682464A (en) * | 1952-06-26 | 1954-06-29 | Eastman Kodak Co | Method of packaging and stabilizing single-powder developers |
| US2682465A (en) * | 1952-06-26 | 1954-06-29 | Eastman Kodak Co | Method of packaging and stabilizing single-powder developers |
| US2685513A (en) * | 1952-06-26 | 1954-08-03 | Eastman Kodak Co | Method of stabilizing hydrates of sodium metaborate and single powder photographic developers containing same |
| US2725294A (en) * | 1952-07-17 | 1955-11-29 | Eastman Kodak Co | Hardening of gelatin with polyanhydrides |
| US2739894A (en) * | 1954-04-01 | 1956-03-27 | Eastman Kodak Co | Single powder photographic developers containing lithium hydroxide |
| US2825647A (en) * | 1954-10-28 | 1958-03-04 | Robert E Fuller | Photographic developer |
| US2943935A (en) * | 1957-05-15 | 1960-07-05 | Gen Aniline & Film Corp | Stabilization of photographic bleach powders containing an alkali metal ferricyanide |
| US3169073A (en) * | 1961-11-16 | 1965-02-09 | Francis B Weakley | High solids protein-polymeric dialde-hyde coating compositions |
| US4294911A (en) * | 1979-06-18 | 1981-10-13 | Eastman Kodak Company | Development of light-sensitive quinone diazide compositions using sulfite stabilizer |
| US4467027A (en) * | 1981-05-25 | 1984-08-21 | Konishiroku Photo Industry Co., Ltd. | Process of developing posi-type lithographic printing plate with inorganic alkali solution |
| FR2605116A1 (fr) * | 1986-10-09 | 1988-04-15 | Du Pont | Procede pour preparer un revelateur photographique sous forme de poudre seche, et poudre obtenue par ce procede |
| US5506092A (en) * | 1993-12-06 | 1996-04-09 | Konica Corporation | Method of processing black and white silver halide photographic compositions with a developer containing an anti sludgant |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2384592A (en) * | 1943-04-22 | 1945-09-11 | Eastman Kodak Co | Single-powder photographic developers |
-
0
- BE BE509125D patent/BE509125A/xx unknown
-
1951
- 1951-02-09 US US210284A patent/US2606118A/en not_active Expired - Lifetime
-
1952
- 1952-02-05 FR FR1050242D patent/FR1050242A/fr not_active Expired
- 1952-02-11 GB GB3521/52A patent/GB698311A/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2384592A (en) * | 1943-04-22 | 1945-09-11 | Eastman Kodak Co | Single-powder photographic developers |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2666702A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single powder photographic developers having improved stability to high temperatures |
| US2666703A (en) * | 1952-06-26 | 1954-01-19 | Eastman Kodak Co | Single-powder photographic developers stabilized with metaboric acid |
| US2682464A (en) * | 1952-06-26 | 1954-06-29 | Eastman Kodak Co | Method of packaging and stabilizing single-powder developers |
| US2682465A (en) * | 1952-06-26 | 1954-06-29 | Eastman Kodak Co | Method of packaging and stabilizing single-powder developers |
| US2685513A (en) * | 1952-06-26 | 1954-08-03 | Eastman Kodak Co | Method of stabilizing hydrates of sodium metaborate and single powder photographic developers containing same |
| US2725294A (en) * | 1952-07-17 | 1955-11-29 | Eastman Kodak Co | Hardening of gelatin with polyanhydrides |
| US2739894A (en) * | 1954-04-01 | 1956-03-27 | Eastman Kodak Co | Single powder photographic developers containing lithium hydroxide |
| US2825647A (en) * | 1954-10-28 | 1958-03-04 | Robert E Fuller | Photographic developer |
| US2943935A (en) * | 1957-05-15 | 1960-07-05 | Gen Aniline & Film Corp | Stabilization of photographic bleach powders containing an alkali metal ferricyanide |
| US3169073A (en) * | 1961-11-16 | 1965-02-09 | Francis B Weakley | High solids protein-polymeric dialde-hyde coating compositions |
| US4294911A (en) * | 1979-06-18 | 1981-10-13 | Eastman Kodak Company | Development of light-sensitive quinone diazide compositions using sulfite stabilizer |
| US4467027A (en) * | 1981-05-25 | 1984-08-21 | Konishiroku Photo Industry Co., Ltd. | Process of developing posi-type lithographic printing plate with inorganic alkali solution |
| FR2605116A1 (fr) * | 1986-10-09 | 1988-04-15 | Du Pont | Procede pour preparer un revelateur photographique sous forme de poudre seche, et poudre obtenue par ce procede |
| US5506092A (en) * | 1993-12-06 | 1996-04-09 | Konica Corporation | Method of processing black and white silver halide photographic compositions with a developer containing an anti sludgant |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1050242A (fr) | 1954-01-06 |
| BE509125A (en(2012)) | |
| GB698311A (en) | 1953-10-14 |
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