US2105274A - Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof - Google Patents
Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof Download PDFInfo
- Publication number
- US2105274A US2105274A US109792A US10979236A US2105274A US 2105274 A US2105274 A US 2105274A US 109792 A US109792 A US 109792A US 10979236 A US10979236 A US 10979236A US 2105274 A US2105274 A US 2105274A
- Authority
- US
- United States
- Prior art keywords
- iodonium
- yellow stain
- preventing yellow
- photographic
- regulation
- 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
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
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/08—Sensitivity-increasing substances
- G03C1/10—Organic substances
-
- 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
- G03C1/00—Photosensitive materials
- G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
- G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
- G03C1/34—Fog-inhibitors; Stabilisers; Agents inhibiting latent image regression
Definitions
- Thisinvention relates to a product and process of preventing yellow stain in photographic prepof thallium salts has a tendency to iorm fog in,
- iodonium compounds have all the good properties of the thallium salts when used in photographic solutions and they also act to prevent fog and particularly yellow stain, while at the same time, they do not interiere in the least with sensitivity and grada- Furthermore, the use of iodonium comcipitation of silver in the deepest blacks that are non-bronzing and which are free from reflection.
- Ii iodonium salts in slight quantities are added after mixing, ripening and subsequent ripening'can be carried out at a constant low content oi halogen ions. Also, when iodonium .compounds'are added after ripening, or to the wash water, washing out can be eflected at a constant .low content of halogen ions, whereby considerable inequalities in washing out the halogen ions in the'outer layers can be avoided.
- iodonium compounds to a developer also prevents the troublesome con 1 centra't ion of potassium bromide or iodide. Similarly such addition to the'fixing bath prevents concentration of iodine ions .which delays fixing. Furthermore the addition of iodonium compounds to fixing baths which .have been desilverized and used serves to regenerate the baths so that they may be used again. addition to the aforementioned desirable properties being secured in emulsions and developers by the use of iodonium compounds therein,
- these compounds have a marked anti-fog effect when added thereto.
- This anti-fog efiect is present even when the iodonium. compounds are added to other than the emulsion, as for example to the protective layer, the backing or even to the paper support for the emulsion.
- Example 1 least tendency to form yellow stain even during prolonged development.
- Example 2 formation of bromine and iodine ions which in- 1 teriere with development is prevented, as these ions precipitate as difli'cultly soluble diphenyl iodonium bromide or iodide. If necessary, the amount of iodonium compound can be increased according to the quantity of potassium bromide and iodide formed.
- I claim: 1. The method of preventing yellow stain and regulating the halogen-ions in light sensitive silver halide emulsions, which consists in treata ing said emulsions with a solution containing a soluble iodonium compound.
- The' method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensitive silver halide layer is a solution containing a developing agent and a soluble iodonium compound.
- the method of preventing yellow stain and regulating'the halogen ions in developers which consists in adding iodosobenzene to a solution containing a developing agent capable of developing silver halide, said iodosobenzene disintegrating in the cold into iodoxybenzene and iodobenzene, these two products reacting to form a diphenyl-iodonium compound, and developing an exposed light sensitive silver halide layer in said solution.
- the method of preventing yellow stain and regulating the halogen ions in developers which consists in developing an exposed light sensi- Y tive'silver halide layer in a solution containing a developing agent and diphenyl-iodonium nitrate.
- a photographic light sensitive element comprising silver halide emulsiomand a soluble .iodonium compound therein for preventing yellow stain. 4
- a photographic developer comprising a developing agent capable of developing a silver halide image, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.
- a photographic fixing bath comprising a silver halide solvent, and a soluble iodonium compound therein for preventing yellow stain and regulating the halogen ions.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES0120831 | 1935-12-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2105274A true US2105274A (en) | 1938-01-11 |
Family
ID=7535343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US109792A Expired - Lifetime US2105274A (en) | 1935-12-13 | 1936-11-07 | Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof |
Country Status (3)
Country | Link |
---|---|
US (1) | US2105274A (hu) |
BE (1) | BE436891A (hu) |
FR (1) | FR809623A (hu) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2561166A (en) * | 1948-12-01 | 1951-07-17 | Gen Aniline & Film Corp | Thallium salts in photographic color developers |
US2572903A (en) * | 1944-06-22 | 1951-10-30 | Gen Aniline & Film Corp | Photographic developer containing thallium salts |
US2628167A (en) * | 1948-04-29 | 1953-02-10 | Du Pont | Method of making colloid silver halide emulsions containing thallium |
US3928043A (en) * | 1973-11-16 | 1975-12-23 | Eastman Kodak Co | Photographic elements containing iodoso or iodoxy oxidants |
US5605789A (en) * | 1994-12-22 | 1997-02-25 | Eastman Kodak Company | Iodochloride emulsions containing iodonium salts having high sensitivity and low fog |
EP0768568A3 (en) * | 1995-10-13 | 1997-05-14 | Konica Corporation | Silver halide photographic light-sensitive material |
US5714311A (en) * | 1997-01-08 | 1998-02-03 | Eastman Kodak Company | Thermally processable imaging element comprising aryliodonium compounds |
US5733717A (en) * | 1997-01-08 | 1998-03-31 | Eastman Kodak Company | Silver halide photographic elements containing aryliodonium compounds |
US5750324A (en) * | 1997-01-08 | 1998-05-12 | Eastman Kodak Company | High chloride emulsions with improved reciprocity |
-
0
- BE BE436891D patent/BE436891A/xx unknown
-
1936
- 1936-08-14 FR FR809623D patent/FR809623A/fr not_active Expired
- 1936-11-07 US US109792A patent/US2105274A/en not_active Expired - Lifetime
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2572903A (en) * | 1944-06-22 | 1951-10-30 | Gen Aniline & Film Corp | Photographic developer containing thallium salts |
US2628167A (en) * | 1948-04-29 | 1953-02-10 | Du Pont | Method of making colloid silver halide emulsions containing thallium |
US2561166A (en) * | 1948-12-01 | 1951-07-17 | Gen Aniline & Film Corp | Thallium salts in photographic color developers |
US3928043A (en) * | 1973-11-16 | 1975-12-23 | Eastman Kodak Co | Photographic elements containing iodoso or iodoxy oxidants |
US5605789A (en) * | 1994-12-22 | 1997-02-25 | Eastman Kodak Company | Iodochloride emulsions containing iodonium salts having high sensitivity and low fog |
EP0768568A3 (en) * | 1995-10-13 | 1997-05-14 | Konica Corporation | Silver halide photographic light-sensitive material |
US5851753A (en) * | 1995-10-13 | 1998-12-22 | Konica Corporation | Silver halide photographic light-sensitive material |
US5714311A (en) * | 1997-01-08 | 1998-02-03 | Eastman Kodak Company | Thermally processable imaging element comprising aryliodonium compounds |
US5733717A (en) * | 1997-01-08 | 1998-03-31 | Eastman Kodak Company | Silver halide photographic elements containing aryliodonium compounds |
US5750324A (en) * | 1997-01-08 | 1998-05-12 | Eastman Kodak Company | High chloride emulsions with improved reciprocity |
Also Published As
Publication number | Publication date |
---|---|
FR809623A (fr) | 1937-03-08 |
BE436891A (hu) |
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