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GB789823A - Improvements in or relating to photographic sensitive emulsions - Google Patents

Improvements in or relating to photographic sensitive emulsions

Info

Publication number
GB789823A
GB789823A GB1243555A GB1243555A GB789823A GB 789823 A GB789823 A GB 789823A GB 1243555 A GB1243555 A GB 1243555A GB 1243555 A GB1243555 A GB 1243555A GB 789823 A GB789823 A GB 789823A
Authority
GB
United Kingdom
Prior art keywords
nickel
carbide
powder
june
relating
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
Application number
GB1243555A
Inventor
Paul August Faelens
Laurent Pierre Roosens
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
Original Assignee
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
Priority to BE547323D priority Critical patent/BE547323A/xx
Application filed by Gevaert Photo Producten NV filed Critical Gevaert Photo Producten NV
Priority to GB1243555A priority patent/GB789823A/en
Priority to FR1151559D priority patent/FR1151559A/en
Priority to DEG19522A priority patent/DE1020864B/en
Publication of GB789823A publication Critical patent/GB789823A/en
Expired legal-status Critical Current

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
    • G03C1/09—Noble metals or mercury; Salts or compounds thereof; Sulfur, selenium or tellurium, or compounds thereof, e.g. for chemical sensitising

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)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Powder Metallurgy (AREA)

Abstract

789,823. Nickel alloys; powder metallurgy. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 20, 1955 [June 18, 1954], No. 17821/55. Class 82(1) [Also in Group XL(a)] The base for an oxide-coated cathode consists essentially of nickel containing from 0.1 to 10 per cent by weight of at least one refractory carbide. Tungsten carbide is preferred, but carbides of Mo, Cr, Ta, Nb, V, Hf, Zr, Ti, La, Y, Co, Pr, Th, U, Si, and Al are also mentioned. A suitable mixture is nickel powder of grain size 4 to 5Á, and tungsten carbide powder of grain size 1Á mixed in the proportions 100:3¢, and sintered at 1250‹C. for two hours Alternatively the carbide powder may be added to melted nickel in vacuo. Carbide of larger grain may be used for low temperature cathodes.
GB1243555A 1955-04-29 1955-04-29 Improvements in or relating to photographic sensitive emulsions Expired GB789823A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE547323D BE547323A (en) 1955-04-29
GB1243555A GB789823A (en) 1955-04-29 1955-04-29 Improvements in or relating to photographic sensitive emulsions
FR1151559D FR1151559A (en) 1955-04-29 1956-04-28 light sensitive photographic emulsions
DEG19522A DE1020864B (en) 1955-04-29 1956-04-28 Process for the preparation of light-sensitive photographic emulsions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1243555A GB789823A (en) 1955-04-29 1955-04-29 Improvements in or relating to photographic sensitive emulsions

Publications (1)

Publication Number Publication Date
GB789823A true GB789823A (en) 1958-01-29

Family

ID=10004546

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1243555A Expired GB789823A (en) 1955-04-29 1955-04-29 Improvements in or relating to photographic sensitive emulsions

Country Status (4)

Country Link
BE (1) BE547323A (en)
DE (1) DE1020864B (en)
FR (1) FR1151559A (en)
GB (1) GB789823A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062651A (en) * 1959-01-21 1962-11-06 Eastman Kodak Co Unhardened, fogged emulsions and method of processing to positive images
EP0698817A1 (en) 1994-08-22 1996-02-28 Agfa-Gevaert N.V. Assortment of silver halide photographic industrial X-ray films and method of processing said assortment
EP0754971A1 (en) 1995-07-18 1997-01-22 Agfa-Gevaert N.V. Material for industrial radiography and development method thereof
EP0794456A1 (en) 1996-03-07 1997-09-10 Agfa-Gevaert N.V. Method of reproducing an electronically stored medical image on a light-sensitive photographic material
US5763152A (en) * 1995-03-31 1998-06-09 Fuji Photo Film Co., Ltd. Silver halide photographic light-sensitive material
US6040129A (en) * 1999-04-09 2000-03-21 Eastman Kodak Company Photographic emulsion having an improved speed, photographic element containing said emulsion, and method

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2057764A (en) * 1933-07-22 1936-10-20 Agfa Ansco Corp Manufacture of stabilized silver halide emulsions

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062651A (en) * 1959-01-21 1962-11-06 Eastman Kodak Co Unhardened, fogged emulsions and method of processing to positive images
EP0698817A1 (en) 1994-08-22 1996-02-28 Agfa-Gevaert N.V. Assortment of silver halide photographic industrial X-ray films and method of processing said assortment
US5763152A (en) * 1995-03-31 1998-06-09 Fuji Photo Film Co., Ltd. Silver halide photographic light-sensitive material
EP0754971A1 (en) 1995-07-18 1997-01-22 Agfa-Gevaert N.V. Material for industrial radiography and development method thereof
EP0794456A1 (en) 1996-03-07 1997-09-10 Agfa-Gevaert N.V. Method of reproducing an electronically stored medical image on a light-sensitive photographic material
US6040129A (en) * 1999-04-09 2000-03-21 Eastman Kodak Company Photographic emulsion having an improved speed, photographic element containing said emulsion, and method

Also Published As

Publication number Publication date
DE1020864B (en) 1957-12-12
FR1151559A (en) 1958-01-31
BE547323A (en)

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