US2546642A - Light-sensitive photographic emulsion - Google Patents

Light-sensitive photographic emulsion Download PDF

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Publication number
US2546642A
US2546642A US744522A US74452247A US2546642A US 2546642 A US2546642 A US 2546642A US 744522 A US744522 A US 744522A US 74452247 A US74452247 A US 74452247A US 2546642 A US2546642 A US 2546642A
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US
United States
Prior art keywords
light
sensitive photographic
emulsion
styryl
photographic emulsion
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
Application number
US744522A
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English (en)
Inventor
Koerber Willem Karel Antoon
Desire Maria Aloysius Goethem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gevaert Photo Producten NV
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Gevaert Photo Producten NV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Application granted granted Critical
Publication of US2546642A publication Critical patent/US2546642A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N3/00—Other muscle-operated starting apparatus
    • F02N3/02—Other muscle-operated starting apparatus having pull-cords
    • 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
    • G03C1/28—Sensitivity-increasing substances together with supersensitising substances

Definitions

  • the primary object of our invention is to provide J- an* improved light-sensitive photographic z silverhalide emulsion.
  • A- more specic object is, to provide a lightsensitive photographic emulsion having a supersensitizing quality. It is known to increase the spectral sensitivity of a photographic emulsion by simultaneously using a sensitizing dyestuihwhich'.
  • a still further object is to provide a photographic element comprising a support coated with l such a supersensitiaed emulsion.
  • D representsnon-metallic atoms necessary to complete a heterocyclic 5- or o-membered ring
  • R represents alkyl, aryl or aralkyl
  • the main sensitizer and supersensitizer may simultaneously be added to the emulsion; or the coated light-sensitive emulsion already containing the main sensitizer may be bathed in a solution of the supersensitizer; or the non-sensitized emulsion layer may be bathed in a mixture of the two sensitizers. Finally, the supersensitizer may be added to the anti-stress layer or to the barite layer.
  • the light-sensitive emulsion may be prepared with the help of any binder known in the photographic emulsion technique, e. g., gelatine and vinylpolymers.
  • R. represents alkyl, aryl, aralkyl
  • X represents a member selected from the group consisting of halogen and an acid residue
  • n a positive integer
  • Y represents aryl
  • X represents a monovalent group selected from the group consisting of alkyl and hydrogen
  • X represents an alkyl group
  • D represents the nonnetallic atoms necessary-to complete a member selected from the group consisting of heterocyclic -membered and het- ⁇ erocyclic -membered rings,
  • R represents alkyl, aryl, aralkyl
  • X represents a member selected from the group consisting of halogen and an acid residue
  • D represents the non-metallic atoms necessary to complete a member selected from the group and as a supersensitizer alphamercapto-iso valerio acid p-chloroanilide.
  • D represents the non-metallic atoms necessary to 20 complete a member selected from the group 6 consisting of heterocyclic -membered and heterocyclio -rnembered rings,
  • R represents alkyl, aryl, aralkyl, R and R represent alkyl
  • X represents a member selected from the group consisting of halogen and an acid residue
  • n represents a positive integer

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
US744522A 1941-09-05 1947-04-28 Light-sensitive photographic emulsion Expired - Lifetime US2546642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE234132X 1941-09-05

Publications (1)

Publication Number Publication Date
US2546642A true US2546642A (en) 1951-03-27

Family

ID=5889850

Family Applications (1)

Application Number Title Priority Date Filing Date
US744522A Expired - Lifetime US2546642A (en) 1941-09-05 1947-04-28 Light-sensitive photographic emulsion

Country Status (6)

Country Link
US (1) US2546642A (xx)
BE (1) BE447040A (xx)
CH (2) CH234132A (xx)
FR (2) FR885376A (xx)
GB (1) GB615430A (xx)
NL (1) NL60339C (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457078A (en) * 1964-03-11 1969-07-22 Agfa Ag Supersensitized silver halide emulsions
US4105451A (en) * 1976-12-22 1978-08-08 Eastman Kodak Company Photothermographic material, composition and process
US5232069A (en) * 1992-07-29 1993-08-03 Mtd Products Inc. Grease fitting and grease fitting plug for wheel hub

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10036521C2 (de) * 2000-07-27 2003-12-11 Agfa Gevaert Ag Fotografisches Silberhalogenidmaterial

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075046A (en) * 1932-11-04 1937-03-30 Eastman Kodak Co Photographic emulsion containing supersensitized pinacyanol

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2075046A (en) * 1932-11-04 1937-03-30 Eastman Kodak Co Photographic emulsion containing supersensitized pinacyanol

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3457078A (en) * 1964-03-11 1969-07-22 Agfa Ag Supersensitized silver halide emulsions
US4105451A (en) * 1976-12-22 1978-08-08 Eastman Kodak Company Photothermographic material, composition and process
US5232069A (en) * 1992-07-29 1993-08-03 Mtd Products Inc. Grease fitting and grease fitting plug for wheel hub

Also Published As

Publication number Publication date
CH234132A (de) 1944-09-15
FR53341E (fr) 1945-10-16
CH252075A (de) 1947-11-30
FR885376A (fr) 1943-09-13
NL60339C (xx)
BE447040A (xx)
GB615430A (en) 1949-01-06

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