GB1335851A - Spectral sensitization of direct-positive silver halide emulsions - Google Patents

Spectral sensitization of direct-positive silver halide emulsions

Info

Publication number
GB1335851A
GB1335851A GB3935370A GB1335851DA GB1335851A GB 1335851 A GB1335851 A GB 1335851A GB 3935370 A GB3935370 A GB 3935370A GB 1335851D A GB1335851D A GB 1335851DA GB 1335851 A GB1335851 A GB 1335851A
Authority
GB
United Kingdom
Prior art keywords
silver halide
direct
represent
silver
group
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
GB3935370A
Other languages
English (en)
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.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert 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 Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of GB1335851A publication Critical patent/GB1335851A/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
    • G03C1/28—Sensitivity-increasing substances together with supersensitising substances
    • G03C1/29—Sensitivity-increasing substances together with supersensitising substances the supersensitising mixture being solely composed of dyes ; Combination of dyes, even if the supersensitising effect is not explicitly disclosed
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/06—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups three >CH- groups, e.g. carbocyanines
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/10—The polymethine chain containing an even number of >CH- groups
    • 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
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged
    • G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser
    • G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
GB3935370A 1970-08-14 1970-08-14 Spectral sensitization of direct-positive silver halide emulsions Expired GB1335851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3935370 1970-08-14

Publications (1)

Publication Number Publication Date
GB1335851A true GB1335851A (en) 1973-10-31

Family

ID=10409095

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3935370A Expired GB1335851A (en) 1970-08-14 1970-08-14 Spectral sensitization of direct-positive silver halide emulsions

Country Status (7)

Country Link
US (1) US3759713A (fr)
JP (1) JPS5434329B1 (fr)
BE (1) BE769752A (fr)
CA (1) CA971814A (fr)
DE (1) DE2133868A1 (fr)
FR (1) FR2101617A5 (fr)
GB (1) GB1335851A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080207A (en) 1976-06-29 1978-03-21 Eastman Kodak Company Radiation-sensitive compositions and photographic elements containing N-(acylhydrazinophenyl) thioamide nucleating agents
GB2316754A (en) * 1996-08-30 1998-03-04 Ilford Ltd Variable contrast photographic material

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2260117A1 (de) * 1972-12-08 1974-06-12 Agfa Gevaert Ag Photographisches material zur herstellung direktpositiver bilder
US4045228A (en) * 1972-12-08 1977-08-30 Agfa-Gevaert N.V. Direct positive emulsions containing fogged, monodispersed silver halide grains having more than 10 mile % iodide
DE2263246A1 (de) * 1972-12-23 1974-07-04 Agfa Gevaert Ag Photographisches material zur herstellung direktpositiver photographischer bilder
JPS5638938B2 (fr) * 1973-08-06 1981-09-09
US4355098A (en) * 1981-02-11 1982-10-19 E. I. Du Pont De Nemours And Company Supersensitizing direct positive dye combinations
JPS5938739A (ja) * 1982-08-27 1984-03-02 Fuji Photo Film Co Ltd 直接ポジ用ハロゲン化銀写真乳剤
JPS60136738A (ja) * 1983-12-22 1985-07-20 Fuji Photo Film Co Ltd ハロゲン化銀写真感光材料
JPH0355538A (ja) * 1989-07-24 1991-03-11 Konica Corp ハロゲン化銀写真感光材料
EP1168065A1 (fr) * 2000-06-06 2002-01-02 Agfa-Gevaert Matériau photographique à l'halogénure d'argent pour l'enregistrement d'images positives directes et procédé d'enregistrement des images
US6503697B2 (en) 2000-06-06 2003-01-07 Agfa-Gevaert Light-sensitive silver halide photographic material for forming direct-positive images and method for making same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080207A (en) 1976-06-29 1978-03-21 Eastman Kodak Company Radiation-sensitive compositions and photographic elements containing N-(acylhydrazinophenyl) thioamide nucleating agents
GB2316754A (en) * 1996-08-30 1998-03-04 Ilford Ltd Variable contrast photographic material
GB2316754B (en) * 1996-08-30 2000-09-27 Ilford Ltd Variable contrast photographic material

Also Published As

Publication number Publication date
DE2133868A1 (de) 1972-03-02
BE769752A (fr) 1972-01-10
JPS5434329B1 (fr) 1979-10-26
CA971814A (en) 1975-07-29
FR2101617A5 (fr) 1972-03-31
US3759713A (en) 1973-09-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee