US2673149A - Quaternary salts in mixed grain photographic emulsions - Google Patents
Quaternary salts in mixed grain photographic emulsions Download PDFInfo
- Publication number
- US2673149A US2673149A US251833A US25183351A US2673149A US 2673149 A US2673149 A US 2673149A US 251833 A US251833 A US 251833A US 25183351 A US25183351 A US 25183351A US 2673149 A US2673149 A US 2673149A
- Authority
- US
- United States
- Prior art keywords
- grains
- silver halide
- silver
- mixed grain
- bromide
- 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
- 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
- G03C1/12—Methine and polymethine dyes
-
- 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
- G03C1/102—Organic substances dyes other than methine dyes
Definitions
- affinity is less for silver chloride than for silver bromide, so that there is the most difiiculty when itiis necessary to aavoid diffusion of 'Thisisituation is three-color-emul- :sion "where, it 1 is :desirable to use high chloride .aemu'lsions IfOI;th8 red1sensitiveandrgreemsensr tive grains so1thatt.theirr;blue sensitivitywill :be negligible compared1to the blue-sensitive grains, or so that it canbe eliminated a yellow printing filter.
- an object of the present invention to provide a novel method of sensitizing .mixedngrain photosraphic-emulsions.
- a further .Qbjectis t'o provide a method for; preventing ssensitizer. diffusioni inmixed grain emulsions.
- a still further object is torprovidenovel mixed grain gphotographicproducts. 'Other objects will .ap- .pear .from the, following 1 description 1 of any in- ,vention.
- My invention comprises in general the provision of a mixed grain photographicemulsion having to different spectral regions, in .a .hydrophylic carrier, one. .or. more of .the sets .of. grains; having a...quaternary.salt.adsorbedthereto.
- silver'halide may ,be. silver chloride, silver .bromide, .silver chlorobromide, silver bromoio- ,;dide,..etc., .in..a..carrierv such. .asgelatin, polyvinyl valcohol, hydrolyzed cellulose esters or ethers, etc.
- quaternary salt may; be awhloride
- Pentamethylene bis abenzo thiazolium perchlorate heptamethylene -1bisidecamethyleneebisbenzothiazolium perchlorate.
- Other bis quaternary salts of antifoggants may be used, c. .g. the bis quaternary-salts of the thiazoles, naph- "stitution such as alkyl, aryl,.alkoxy. or halogen *Thetoptical sensitizing dyes useful in my mixe'd grain emulsions embrace the "following:
- Carbocyanines derived from ,e-naphtho- include .carbo cyaninechloride. 3,3 -'dimethyl 9 -;phenyl-- 4.5.4.25 :dibenz ithiacarbocyanine bromide.
- optical sensitizing dyes are preferably used at a concentration of from '7 to 50 mg. of sensitizing dye per liter of silver halide emulsion containing about 0.25 gram mole of silver halide per liter of emulsion.
- the silver halide emulsion is treated with the quaternary salt before or after optical sensitizing.
- the blue sensitive component of the mixture no optical sensitizing dye is ordinarily used.
- the silver halide With the red-sensitive and green-sensitive components of the mixture, the silver halide is optically sensitized to the desired spectral region and is then treated with the quaternary salt, although the quaternary salt may be omitted from the unsensitized bluesensitive grains.
- the amount of quaternary salt may vary from about 20 to 400 milligrams per mole of silver halide.
- silver halide emulsions sensitized to different spectral regions are mixed in approximately equal amounts or in amounts containing approximately equal quantities of silver.
- a red-sensitive equal 'to 20 mole-percent of the silver and chloride in excess of the remaining 80 mole-percent was sensitized with 3,3-dimethyl-9-phenyl- 4,5,4,5'-dibenzthiacarbocyanine chloride, 88 mg. per mole of silver halide, and digested 5 min- C. with the dye. After cooling to 40 decamethylene-bis-benzolthiazolium peroi 175 mg. per mole of silver halide was added.
- the usual spreading agents and hardener were added to each of the emulsions and. the emulsions were then mixed in amounts containing equal amounts of silver and immediately coated.
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- General Physics & Mathematics (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE514795D BE514795A (xx) | 1951-10-17 | ||
US251833A US2673149A (en) | 1951-10-17 | 1951-10-17 | Quaternary salts in mixed grain photographic emulsions |
GB22466/52A GB722231A (en) | 1951-10-17 | 1952-09-08 | Improvements in mixed grain photographic emulsions |
DEE6007A DE971466C (de) | 1951-10-17 | 1952-09-12 | Verfahren zur Verhinderung der Diffusion von Sensibilisatoren in gemischtkoernigen Emulsionen |
FR1099927D FR1099927A (fr) | 1951-10-17 | 1952-10-17 | Nouvelles émulsions photosensibles à grains mélangés et procédé pour leur préparation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US251833A US2673149A (en) | 1951-10-17 | 1951-10-17 | Quaternary salts in mixed grain photographic emulsions |
Publications (1)
Publication Number | Publication Date |
---|---|
US2673149A true US2673149A (en) | 1954-03-23 |
Family
ID=22953606
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US251833A Expired - Lifetime US2673149A (en) | 1951-10-17 | 1951-10-17 | Quaternary salts in mixed grain photographic emulsions |
Country Status (5)
Country | Link |
---|---|
US (1) | US2673149A (xx) |
BE (1) | BE514795A (xx) |
DE (1) | DE971466C (xx) |
FR (1) | FR1099927A (xx) |
GB (1) | GB722231A (xx) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3062645A (en) * | 1957-11-27 | 1962-11-06 | Eastman Kodak Co | Sensitization of photographic emulsions to be developed with p-phenylenediamine developing agents |
US3502467A (en) * | 1967-12-12 | 1970-03-24 | Eastman Kodak Co | High temperature processing in dyedeveloper diffusion transfer systems |
US4351898A (en) * | 1978-01-03 | 1982-09-28 | Goldberg Richard J | Mixed grain single emulsion layer photographic material |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE514795A (xx) * | 1951-10-17 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2288226A (en) * | 1940-02-29 | 1942-06-30 | Eastman Kodak Co | Photographic emulsion |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB587434A (en) * | 1939-12-20 | 1947-04-25 | Gevaert Photo Prod Nv | Improvements in and relating to the preparation of heterocyclic nitrogen compounds |
BE491769A (xx) * | 1948-10-30 | |||
BE514795A (xx) * | 1951-10-17 |
-
0
- BE BE514795D patent/BE514795A/xx unknown
-
1951
- 1951-10-17 US US251833A patent/US2673149A/en not_active Expired - Lifetime
-
1952
- 1952-09-08 GB GB22466/52A patent/GB722231A/en not_active Expired
- 1952-09-12 DE DEE6007A patent/DE971466C/de not_active Expired
- 1952-10-17 FR FR1099927D patent/FR1099927A/fr not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2288226A (en) * | 1940-02-29 | 1942-06-30 | Eastman Kodak Co | Photographic emulsion |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3062645A (en) * | 1957-11-27 | 1962-11-06 | Eastman Kodak Co | Sensitization of photographic emulsions to be developed with p-phenylenediamine developing agents |
US3502467A (en) * | 1967-12-12 | 1970-03-24 | Eastman Kodak Co | High temperature processing in dyedeveloper diffusion transfer systems |
US4351898A (en) * | 1978-01-03 | 1982-09-28 | Goldberg Richard J | Mixed grain single emulsion layer photographic material |
Also Published As
Publication number | Publication date |
---|---|
GB722231A (en) | 1955-01-19 |
FR1099927A (fr) | 1955-09-14 |
BE514795A (xx) | |
DE971466C (de) | 1959-01-29 |
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