US2784086A - Concentrated developers - Google Patents
Concentrated developers Download PDFInfo
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- US2784086A US2784086A US370867A US37086753A US2784086A US 2784086 A US2784086 A US 2784086A US 370867 A US370867 A US 370867A US 37086753 A US37086753 A US 37086753A US 2784086 A US2784086 A US 2784086A
- Authority
- US
- United States
- Prior art keywords
- developer
- sodium
- alginic acid
- water
- gel
- 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
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- 235000010443 alginic acid Nutrition 0.000 claims description 15
- 229920000615 alginic acid Polymers 0.000 claims description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000000783 alginic acid Substances 0.000 claims description 11
- 229960001126 alginic acid Drugs 0.000 claims description 11
- 150000004781 alginic acids Chemical class 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 9
- 150000003839 salts Chemical class 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- -1 SILVER HALIDE Chemical class 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000000499 gel Substances 0.000 description 16
- 239000000084 colloidal system Substances 0.000 description 13
- 239000000243 solution Substances 0.000 description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 description 6
- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- IOLCXVTUBQKXJR-UHFFFAOYSA-M potassium bromide Chemical compound [K+].[Br-] IOLCXVTUBQKXJR-UHFFFAOYSA-M 0.000 description 6
- 235000010413 sodium alginate Nutrition 0.000 description 6
- 239000000661 sodium alginate Substances 0.000 description 6
- 229940005550 sodium alginate Drugs 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 4
- 150000003385 sodium Chemical class 0.000 description 4
- GEHJYWRUCIMESM-UHFFFAOYSA-L sodium sulfite Chemical compound [Na+].[Na+].[O-]S([O-])=O GEHJYWRUCIMESM-UHFFFAOYSA-L 0.000 description 4
- 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 3
- 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 3
- HDSBZMRLPLPFLQ-UHFFFAOYSA-N Propylene glycol alginate Chemical compound OC1C(O)C(OC)OC(C(O)=O)C1OC1C(O)C(O)C(C)C(C(=O)OCC(C)O)O1 HDSBZMRLPLPFLQ-UHFFFAOYSA-N 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- TVHALOSDPLTTSR-UHFFFAOYSA-H hexasodium;[oxido-[oxido(phosphonatooxy)phosphoryl]oxyphosphoryl] phosphate Chemical compound [Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[O-]P([O-])(=O)OP([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O TVHALOSDPLTTSR-UHFFFAOYSA-H 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 229910052708 sodium Inorganic materials 0.000 description 3
- 229910000029 sodium carbonate Inorganic materials 0.000 description 3
- 239000012224 working solution Substances 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 2
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical class CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 2
- 229940072056 alginate Drugs 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 235000010265 sodium sulphite Nutrition 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 241000416162 Astragalus gummifer Species 0.000 description 1
- 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 1
- 235000010643 Leucaena leucocephala Nutrition 0.000 description 1
- 240000007472 Leucaena leucocephala Species 0.000 description 1
- 229920000161 Locust bean gum Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 235000015125 Sterculia urens Nutrition 0.000 description 1
- 240000001058 Sterculia urens Species 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 229920001615 Tragacanth Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 235000010407 ammonium alginate Nutrition 0.000 description 1
- 239000000728 ammonium alginate Substances 0.000 description 1
- KPGABFJTMYCRHJ-YZOKENDUSA-N ammonium alginate Chemical compound [NH4+].[NH4+].O1[C@@H](C([O-])=O)[C@@H](OC)[C@H](O)[C@H](O)[C@@H]1O[C@@H]1[C@@H](C([O-])=O)O[C@@H](O)[C@@H](O)[C@H]1O KPGABFJTMYCRHJ-YZOKENDUSA-N 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000015784 hyperosmotic salinity response Effects 0.000 description 1
- 235000010420 locust bean gum Nutrition 0.000 description 1
- 239000000711 locust bean gum Substances 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 235000010487 tragacanth Nutrition 0.000 description 1
- 239000000196 tragacanth Substances 0.000 description 1
- 229940116362 tragacanth Drugs 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
- G03C5/266—Supplying of photographic processing chemicals; Preparation or packaging thereof of solutions or concentrates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
- Y10S430/167—X-ray
Definitions
- This invention relates to photographic developers and more particularly to concentrated photographic developers and methods for their preparation.
- Photographic developers are frequently prepared in a concentrated form to increase the convenience of storage and shipping.
- the concentrate may be a mixed powder comprising the solid ingredients of the formula.
- the concentrate is frequently prepared in liquid form.
- the ordinary components of a developer have a limited solubility and it is uncommon to be able to concentrate the working strength developer by more than two or three times.
- solvents, and of especially soluble developing agents allows rather higher concentration, but the limits are soon reached.
- an excess of the salts or developing agents has been left in the developer in the form of a slurry, but this has not proven satisfactory, as the salts settle out and form larger aggregates which are very diificult to dissolve.
- these objects are attained by suspending the finely ground components of the developer in a highly soluble gel.
- Colloids suitable for this suspension are found in alginic acid (a. polymer of anhydro-fl-d-mannuronic acid) its salts and esters. These are available commercially under such trade names as Kelacid, Kelgin, Kelcoloid, Superloid, etc. These compounds are highly hydrophilic, and their gels show high salt tolerance and disperse readily on addition of more water to the gel. This is in sharp distinction to the characteristics shown by other commonly used hydrophilic colloids, such as karaya, locust bean gum, tragacanth, acacia, and the like.
- the invention therefore comprises the suspension of the finely divided solid components of the photographic developer in a gel made with an appropriate concentration of such a compound of alginic acid as is mentioned above.
- Example 1 A universal developer The individual components of this developer were first ground to pass through an mesh sieve. They were then added successively to ml. of a 2% solution of Kelgin (sodium derivative of algin).
- Example 3 Percent Kelcosol, high viscosity sodium derivative of algin- 0.5 Kelcoloid, low viscosity propylene glycol derivative of alg Kelgin, medium viscosity sodium derivative of algin- Kelgin XL, extra low viscosity sodium derivative of alnin 5 Kelacid, alginic acid 2
- Example 3 Mixing procedure In the procedure of Example 1 the finely ground ingredients were added successively to a solution of the gel. This results in almost immediate setting of the gel.
- Alternative procedures which may be employed include:
- Example 4.-Negative developer The following ingredients, ground to pass a 60-mesh sieve, were added successively to 30 cc. of a 2% solution of sodium alginate, The sodium alginate employed was the Kelgin" of Examples 1 and 3.
- Kelg in is a medium viscosity so dium alginate; Kelcoloid is a propylene glycol derivative of algin; Kelcosol is a high viscosity sodium alginate; and Superloid is a high viscosity ammonium alginate.
- the particular advantage of the present invention is that when the concentrate is diluted to form the working developer, it does not have a viscosity appreciably greater than the same developer without the colloid.
- the sole purpose of the alginate is to hold the solid developer constituents in a uniform suspension from which they will dissolve rapidly to form the working solution.
- a photographic developer comprising a silver halide developer and an alkali both of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of a compound selected from the group consisting-of alginic acid, a salt of 'al'ginic acid, and an ester of alginic acid, said compound *being in to 40% concentration in Water.
- a photographic developer comprising a silver halide developer and an alkali both of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of sodium alginate colloid, said colloid being in /2% to 10% concentration in Water.
- a photographic developer comprising monomethyl p-aminophenol sulfate, hydroquinone, potassium bromide, sodium sulfite, sodium carbonate, and sodium tetraphosphate all of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of sodium alginate colloid, said colloid bein'g in /2'% to 10% concentration 'in water.
- a photographic developer comprising monomethyl p-aminophenol sulfate, hydroquinone, potassium bromide, sodium s'ulfit'e, sodium carbonate, sodium tetraphosphate and phthalic anhydr-ide all of which are in finely ground solid form suspended as a thick paste "in a colloidal gel consisting of sodium alginate colloid, said colloid being in to 10% concentration in water.
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- 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)
- Colloid Chemistry (AREA)
Description
United States Patent G CONCENTRATED DEVELOPERS Richard W. Henn, Rochester, N. Y., assignor to Eastman Kodak Company, Rochester, N. Y., a corporation of New Jersey No Drawing. Application July 28, 1953, Serial No. 370,867
4 Claims. (Cl. 96-66) This invention relates to photographic developers and more particularly to concentrated photographic developers and methods for their preparation.
Photographic developers are frequently prepared in a concentrated form to increase the convenience of storage and shipping. The concentrate may be a mixed powder comprising the solid ingredients of the formula. For convenience in preparing the working solution, however, and to facilitate making small volumes of working solution, the concentrate is frequently prepared in liquid form. Unfortunately, the ordinary components of a developer have a limited solubility and it is uncommon to be able to concentrate the working strength developer by more than two or three times. The use of solvents, and of especially soluble developing agents allows rather higher concentration, but the limits are soon reached. In some cases an excess of the salts or developing agents has been left in the developer in the form of a slurry, but this has not proven satisfactory, as the salts settle out and form larger aggregates which are very diificult to dissolve.
Still another attempt to produce concentrated developers has led to the preparation of pastes in which the components are suspended in such materials as glycerine, a dextrose solution, or a viscous amine. These have never proven satisfactory due to a separation of the salts from the liquid and to the slow solubility of the components.
It is an object of the present invention, therefore, to provide a more suitable method of preparing concentrated photographic developers. It is another object to prepare concentrates of particularly low bulk. It is a further object to prepare concentrates which are readily dispersible in water. Yet another object of the invention is to provide a concentrated developer in which the solid developer constituents are held in a uniform suspension in a colloid comprising alginic acid, salts of alginic acid or esters of alginic acid from which they will dissolve rapidly to form the developing solution. Other objects will become apparent from the description.
In accordance with the invention, these objects are attained by suspending the finely ground components of the developer in a highly soluble gel. Colloids suitable for this suspension are found in alginic acid (a. polymer of anhydro-fl-d-mannuronic acid) its salts and esters. These are available commercially under such trade names as Kelacid, Kelgin, Kelcoloid, Superloid, etc. These compounds are highly hydrophilic, and their gels show high salt tolerance and disperse readily on addition of more water to the gel. This is in sharp distinction to the characteristics shown by other commonly used hydrophilic colloids, such as karaya, locust bean gum, tragacanth, acacia, and the like. The invention therefore comprises the suspension of the finely divided solid components of the photographic developer in a gel made with an appropriate concentration of such a compound of alginic acid as is mentioned above. The
I 2,784,086 Patented Mar. 5 1957 concentration needed will depend on both the nature of the developer and the viscosity of the selected colloid, but will lie between V2 and 10% and more commonly between 1 and 5%. The invention is further illus trated in the following examples:
Example 1.-A universal developer The individual components of this developer were first ground to pass through an mesh sieve. They were then added successively to ml. of a 2% solution of Kelgin (sodium derivative of algin).
Grams Sodium sulfite 24.0 Sodium carbonate 45.0 Elon (monomethyl p-aminophenol sulfate) 1.6 Hydnoquinone 4 .8 Potassium bromidee 1.0 Sodium tetraphosphate 2.0
Example 2.Vqrious colloids In preparing a developer of the above composition and by the above procedure, the following colloids were found suitable:
7 Percent Kelcosol, high viscosity sodium derivative of algin- 0.5 Kelcoloid, low viscosity propylene glycol derivative of alg Kelgin, medium viscosity sodium derivative of algin- Kelgin XL, extra low viscosity sodium derivative of alnin 5 Kelacid, alginic acid 2 Example 3.Mixing procedure In the procedure of Example 1 the finely ground ingredients were added successively to a solution of the gel. This results in almost immediate setting of the gel. Alternative procedures which may be employed include:
(a) The developer ingredients are completely mixed. A suitable preservative, such as phthalic anhydride may be added. They are then finely ground, and added to the gel solution. In the case of the formula of Example 1, stirring for 15 minutes was necessary before gelation occurred and a permanent suspension was produced.
(b) The developer components are ground in water, rather than dry, and the gel is added from a thicker solution. In the case of the formula of Example 1, 48 cc. of water were employed and 28 cc. of a 2% solution of Kelgin. The mixture set rapidly.
(c) The powders are ground directly in the gel. Again using the formula of Example 1, setting was found to occur rapidly if the powders were added successively in the order named, grinding after each addition, but if added as a mixed unit, and then ground, the slurry required stirring for 90 minutes before setting occurred.
Example 4.-Negative developer The following ingredients, ground to pass a 60-mesh sieve, were added successively to 30 cc. of a 2% solution of sodium alginate, The sodium alginate employed was the Kelgin" of Examples 1 and 3.
Grams Sodium sulfi "19.2 Sodium "rnetaborate, -otahydrate 614 Elon -(monomethyl 'p-taminophenol sulfate 116 Hydroquinone 1.6 Potassium bromide 0.3
This yielded a permanent gel of moderate viscosity which was found to be readily dispersible in water. Used in the proportion of 1 part of :gel to '15 :PaItS'Of water it produced a developer'entirely suitable :for-the processing of high speed negative emulsions.
was added to 400 cc. of a 2% solution of Kelgin and 100 cc. of water and ball milled-for "20 hours. The resulting suspension dissolved rapidly in water, to produce a developer suitable for X-ray materials when diluted in the proportions of 1 part of gel to 15 parts of Water.
As indicated above Kelg in is a medium viscosity so dium alginate; Kelcoloid is a propylene glycol derivative of algin; Kelcosol is a high viscosity sodium alginate; and Superloid is a high viscosity ammonium alginate.
The particular advantage of the present invention is that when the concentrate is diluted to form the working developer, it does not have a viscosity appreciably greater than the same developer without the colloid. The sole purpose of the alginate is to hold the solid developer constituents in a uniform suspension from which they will dissolve rapidly to form the working solution.
I claim:
1. A photographic developer comprising a silver halide developer and an alkali both of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of a compound selected from the group consisting-of alginic acid, a salt of 'al'ginic acid, and an ester of alginic acid, said compound *being in to 40% concentration in Water.
2. A photographic developer comprising a silver halide developer and an alkali both of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of sodium alginate colloid, said colloid being in /2% to 10% concentration in Water.
3. A photographic developer comprising monomethyl p-aminophenol sulfate, hydroquinone, potassium bromide, sodium sulfite, sodium carbonate, and sodium tetraphosphate all of which are in finely ground solid form suspended as a thick paste in a colloidal gel consisting of sodium alginate colloid, said colloid bein'g in /2'% to 10% concentration 'in water.
"4.- A photographic developer comprising monomethyl p-aminophenol sulfate, hydroquinone, potassium bromide, sodium s'ulfit'e, sodium carbonate, sodium tetraphosphate and phthalic anhydr-ide all of which are in finely ground solid form suspended as a thick paste "in a colloidal gel consisting of sodium alginate colloid, said colloid being in to 10% concentration in water.
References oitedinthe fileof this patent UNITED STATES PATENTS
Claims (1)
1. A PHOTOGRAPHIC DEVELOPER COMPRISING A SILVER HALIDE DEVELOPER AND AN ALKALI BOTH OF WHICH ARE IN FINELY GROUND SOLID FORM SUSPENDED AS A THICK PASTE IN A COLLOIDAL GEL CONSISTING OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALGINIC ACID, A SALT OF ALGINIC ACID, AND AN ESTER OF ALGINIC ACID, AND COMPOUND BEING IN 1/2% TO 10% CONCENTRATION IN WATER.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US370867A US2784086A (en) | 1953-07-28 | 1953-07-28 | Concentrated developers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US370867A US2784086A (en) | 1953-07-28 | 1953-07-28 | Concentrated developers |
Publications (1)
Publication Number | Publication Date |
---|---|
US2784086A true US2784086A (en) | 1957-03-05 |
Family
ID=23461520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US370867A Expired - Lifetime US2784086A (en) | 1953-07-28 | 1953-07-28 | Concentrated developers |
Country Status (1)
Country | Link |
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US (1) | US2784086A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2840471A (en) * | 1956-09-06 | 1958-06-24 | Francis G Berry | Photographic film developer |
US3153654A (en) * | 1961-05-31 | 1964-10-20 | Ilford Ltd | 3-pyrazolidinone carboxylic acid derivatives |
US3378373A (en) * | 1961-01-18 | 1968-04-16 | Agfa Ag | Water-insoluble nitrogenous photographic protein hardener |
US3960567A (en) * | 1971-08-21 | 1976-06-01 | Fuji Photo Film Co., Ltd. | Process and composition for producing photolithographic plate for the graphic arts |
US4232113A (en) * | 1979-03-14 | 1980-11-04 | Minnesota Mining And Manufacturing Company | Liquid concentrated developer composition, and confection ready to mix with water including it, for use in color photography |
WO1981002934A1 (en) * | 1980-04-11 | 1981-10-15 | Eastman Kodak Co | Photographic processing concentrates |
EP0800111A1 (en) * | 1996-04-02 | 1997-10-08 | Fuji Photo Film Co., Ltd. | Photographic processing composition in slurry form |
US5798204A (en) * | 1994-07-26 | 1998-08-25 | Fuji Photo Film Co., Ltd. | Development processing method of ultrahigh-contrast black-and-white silver halide photographic material |
US5914221A (en) * | 1998-03-11 | 1999-06-22 | Fuji Hunt Photographic Chemicals, Inc. | Single part color photographic processing composition in slurry form |
US5998111A (en) * | 1997-03-31 | 1999-12-07 | Fuji Photo Film Co., Ltd. | Process for producing photographic suspended processing agent composition |
US6020113A (en) * | 1997-03-31 | 2000-02-01 | Fuji Photo Film Co., Ltd. | Process for producing photographic suspended processing agent composition |
US6274300B1 (en) | 1999-08-04 | 2001-08-14 | Fuji Photo Film Co., Ltd. | Concentrated liquid color developer composition for silver halide color photographic material and development processing method |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH115331A (en) * | 1924-05-27 | 1926-06-16 | P Westermann Albert | Process for the manufacture of preparations for photography. |
US2156626A (en) * | 1938-03-16 | 1939-05-02 | American Cyanamid Co | Photographic developing medium producing fine grain results |
US2543181A (en) * | 1947-01-15 | 1951-02-27 | Polaroid Corp | Photographic product comprising a rupturable container carrying a photographic processing liquid |
-
1953
- 1953-07-28 US US370867A patent/US2784086A/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH115331A (en) * | 1924-05-27 | 1926-06-16 | P Westermann Albert | Process for the manufacture of preparations for photography. |
US2156626A (en) * | 1938-03-16 | 1939-05-02 | American Cyanamid Co | Photographic developing medium producing fine grain results |
US2543181A (en) * | 1947-01-15 | 1951-02-27 | Polaroid Corp | Photographic product comprising a rupturable container carrying a photographic processing liquid |
Cited By (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2840471A (en) * | 1956-09-06 | 1958-06-24 | Francis G Berry | Photographic film developer |
US3378373A (en) * | 1961-01-18 | 1968-04-16 | Agfa Ag | Water-insoluble nitrogenous photographic protein hardener |
US3153654A (en) * | 1961-05-31 | 1964-10-20 | Ilford Ltd | 3-pyrazolidinone carboxylic acid derivatives |
US3960567A (en) * | 1971-08-21 | 1976-06-01 | Fuji Photo Film Co., Ltd. | Process and composition for producing photolithographic plate for the graphic arts |
US4232113A (en) * | 1979-03-14 | 1980-11-04 | Minnesota Mining And Manufacturing Company | Liquid concentrated developer composition, and confection ready to mix with water including it, for use in color photography |
WO1981002934A1 (en) * | 1980-04-11 | 1981-10-15 | Eastman Kodak Co | Photographic processing concentrates |
US5798204A (en) * | 1994-07-26 | 1998-08-25 | Fuji Photo Film Co., Ltd. | Development processing method of ultrahigh-contrast black-and-white silver halide photographic material |
EP0800111A1 (en) * | 1996-04-02 | 1997-10-08 | Fuji Photo Film Co., Ltd. | Photographic processing composition in slurry form |
US5891608A (en) * | 1996-04-02 | 1999-04-06 | Fuji Photo Film Co., Ltd. | Photographic processing composition in slurry-form |
US5998111A (en) * | 1997-03-31 | 1999-12-07 | Fuji Photo Film Co., Ltd. | Process for producing photographic suspended processing agent composition |
US6020113A (en) * | 1997-03-31 | 2000-02-01 | Fuji Photo Film Co., Ltd. | Process for producing photographic suspended processing agent composition |
US5914221A (en) * | 1998-03-11 | 1999-06-22 | Fuji Hunt Photographic Chemicals, Inc. | Single part color photographic processing composition in slurry form |
US6197484B1 (en) | 1998-03-11 | 2001-03-06 | Fuji Hunt Photographic Chemicals, Inc. | Method of making a single part color photographic processing composition in slurry form |
US6274300B1 (en) | 1999-08-04 | 2001-08-14 | Fuji Photo Film Co., Ltd. | Concentrated liquid color developer composition for silver halide color photographic material and development processing method |
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