US1673522A - Process of manufacturing photographic silver halide emulsions and products obtained thereby - Google Patents

Process of manufacturing photographic silver halide emulsions and products obtained thereby Download PDF

Info

Publication number
US1673522A
US1673522A US121731A US12173126A US1673522A US 1673522 A US1673522 A US 1673522A US 121731 A US121731 A US 121731A US 12173126 A US12173126 A US 12173126A US 1673522 A US1673522 A US 1673522A
Authority
US
United States
Prior art keywords
silver halide
halide emulsions
photographic silver
emulsion
products obtained
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
US121731A
Other languages
English (en)
Inventor
Matthies Otto
Wulff Peter
Dieterle Walter
Wendt Bruno
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Application granted granted Critical
Publication of US1673522A publication Critical patent/US1673522A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the sensitivity of photographic silver halide emulsions may be raised without fogging, according to t e present invention, by adding to the emulsion, during emulsion making, small quantities of salts soluble in water, the anions of which contain at least three atoms of sulphur.
  • the addition may be made to the constituents of the emulsion, or at any step of emulsion making, or to the finished emulsion. 2a
  • the compounds adapted to be added for this purpose e. g.
  • the. decomposition producing silver-metalloid takes place in the emulsion.
  • the invention depends on the knowledge that the sensitivity of photo- 40 graphic emulsions is raised in a particularly good manner when traces of silver-metalloid, especially of silver sulphide,constituting reducing agents,--are produced by the de- A com osition of the above-mentioned decomposa le compounds inside of the silver halide crystals or on their surfaces.
  • the use of soluble sulphides or of colloidal silver sulhide solutions never results inanalogous increases in the sensitivity of the halide emulsions.
  • Example 2 The same effect is reached by substituting for; the sodium trithionate in Example 1,
  • Process of making a photographic silver halide emulsion which comprises ,incorporating in said emulsion a water-soluble salt the anions of which contain at least three atoms of an element of the sulphur g in; 2. rocess of manufacturing photographic silver halide emulsions which comprises addin to the emulsion Water-soluble saltsthe anions of which contain at least three atoms of an element of the sulphur group.
  • Photographic layers comprising the silver halide emulsion defined in claim 6.

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)
US121731A 1925-07-25 1926-07-10 Process of manufacturing photographic silver halide emulsions and products obtained thereby Expired - Lifetime US1673522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1673522X 1925-07-25

Publications (1)

Publication Number Publication Date
US1673522A true US1673522A (en) 1928-06-12

Family

ID=7738953

Family Applications (1)

Application Number Title Priority Date Filing Date
US121731A Expired - Lifetime US1673522A (en) 1925-07-25 1926-07-10 Process of manufacturing photographic silver halide emulsions and products obtained thereby

Country Status (3)

Country Link
US (1) US1673522A (en))
BE (1) BE335768A (en))
FR (1) FR617564A (en))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440206A (en) * 1944-09-16 1948-04-20 Gen Aniline & Film Corp Stabilized silver halide emulsions
US2448939A (en) * 1944-06-10 1948-09-07 Eastman Kodak Co Thioglycolic amide couplers
US2657135A (en) * 1949-03-02 1953-10-27 Eastman Kodak Co Photographic emulsions and solutions containing thioglycolic acid derivatives
US3033765A (en) * 1958-06-06 1962-05-08 Eastman Kodak Co Photographic production of electrically conducting silver images
US3717466A (en) * 1970-04-01 1973-02-20 Agfa Gevaert Nv Fogged direct positive silver halide element containing a selenium compound sensitizer
EP0447105A1 (en) * 1990-03-08 1991-09-18 Konica Corporation Image forming method
EP0772079A2 (en) 1995-10-31 1997-05-07 Eastman Kodak Company Light-sensitive silber halide emulsions and processes for their preparation

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2448939A (en) * 1944-06-10 1948-09-07 Eastman Kodak Co Thioglycolic amide couplers
US2440206A (en) * 1944-09-16 1948-04-20 Gen Aniline & Film Corp Stabilized silver halide emulsions
US2657135A (en) * 1949-03-02 1953-10-27 Eastman Kodak Co Photographic emulsions and solutions containing thioglycolic acid derivatives
US3033765A (en) * 1958-06-06 1962-05-08 Eastman Kodak Co Photographic production of electrically conducting silver images
US3717466A (en) * 1970-04-01 1973-02-20 Agfa Gevaert Nv Fogged direct positive silver halide element containing a selenium compound sensitizer
EP0447105A1 (en) * 1990-03-08 1991-09-18 Konica Corporation Image forming method
EP0772079A2 (en) 1995-10-31 1997-05-07 Eastman Kodak Company Light-sensitive silber halide emulsions and processes for their preparation

Also Published As

Publication number Publication date
FR617564A (fr) 1927-02-22
BE335768A (en))

Similar Documents

Publication Publication Date Title
US2440110A (en) Stabilized silver halide emulsions
DE2024003A1 (en))
US1673522A (en) Process of manufacturing photographic silver halide emulsions and products obtained thereby
DE884150C (de) Verfahren zur Erzeugung eines direktpositiven Bildes in einer Silberhalogenid-Emulsion
DE2059988A1 (de) Fotografisches Farbentwicklungsverfahren Agfa-Gevaert AG,5090 Leverkusen
DE2100622C2 (de) Lichtempfindliche Silberhalogenidemulsion
DE2932650C2 (de) Verfahren zur Herstellung einer monodispersen photographischen Silberhalogenidemulsion
US2105274A (en) Process of preventing yellow stain in photographic preparations and regulation of the halogen content thereof
US2950972A (en) Photographic emulsions having increased sensitivity to x-ray and gamma ray radiation
US1898512A (en) Process of manufacturing photographic silver salt emulsions and lightsensitive material
DE1175074B (de) Photographisches Material mit einer Halogen-silberemulsionsschicht, die das Fixierenueberfluessig macht
DE939422C (de) Sensibilisiertes photographisches Material
US2699994A (en) Photographic treating solutions containing ferricyanide ions and alpha ether carboxylic acid compounds
DE2436180A1 (de) Silberhalogenidemulsionen mit substituiertem halogenid und produkte, die diese emulsionen enthalten
DE972720C (de) Sensibilisiertes photographisches Material
US1758576A (en) Light-sensitive silver-halide emulsions and process of manufacturing the same
DE2614862A1 (de) Herstellung photographischer silberhalogenidemulsionen
DE960871C (de) Chemisch sensibilisiertes photographisches Material
DE1797388A1 (de) Verfahren zur Herstellung photographischer Bilder
DE2015070A1 (de) Material für die photographische Herstellung positiver und negativer Bilder
DE1125766B (de) Photographisches Material mit sensibilisierter Halogensilberemulsion
DE971450C (de) Stabilisiertes photographisches Material
US3615620A (en) Light-sensitive material
SU13061A1 (ru) Способ изготовлени фотографических эмульсий солей серебра
DE463879C (de) Verfahren zur Herstellung von photographischen Silbersalzemulsionen