CA971814A - Spectral sensitization of direct-positive silver halide emulsions - Google Patents

Spectral sensitization of direct-positive silver halide emulsions

Info

Publication number
CA971814A
CA971814A CA118,220A CA118220A CA971814A CA 971814 A CA971814 A CA 971814A CA 118220 A CA118220 A CA 118220A CA 971814 A CA971814 A CA 971814A
Authority
CA
Canada
Prior art keywords
direct
silver halide
halide emulsions
spectral sensitization
positive silver
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
CA118,220A
Other languages
English (en)
Other versions
CA118220S (en
Inventor
Raymond L. Florens
Theofiel H. Ghys
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 NV
Original Assignee
Agfa Gevaert 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 Agfa Gevaert NV filed Critical Agfa Gevaert NV
Application granted granted Critical
Publication of CA971814A publication Critical patent/CA971814A/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)
CA118,220A 1970-08-14 1971-07-14 Spectral sensitization of direct-positive silver halide emulsions Expired CA971814A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
CA971814A true CA971814A (en) 1975-07-29

Family

ID=10409095

Family Applications (1)

Application Number Title Priority Date Filing Date
CA118,220A Expired CA971814A (en) 1970-08-14 1971-07-14 Spectral sensitization of direct-positive silver halide emulsions

Country Status (7)

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

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE2260117A1 (de) * 1972-12-08 1974-06-12 Agfa Gevaert Ag Photographisches material zur herstellung direktpositiver bilder
DE2263246A1 (de) * 1972-12-23 1974-07-04 Agfa Gevaert Ag Photographisches material zur herstellung direktpositiver photographischer bilder
JPS5638938B2 (de) * 1973-08-06 1981-09-09
US4080207A (en) 1976-06-29 1978-03-21 Eastman Kodak Company Radiation-sensitive compositions and photographic elements containing N-(acylhydrazinophenyl) thioamide nucleating agents
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
GB2316754B (en) * 1996-08-30 2000-09-27 Ilford Ltd Variable contrast photographic material
EP1168065A1 (de) * 2000-06-06 2002-01-02 Agfa-Gevaert Lichtempfindliches photographisches Silberhalogenidmaterial für die Erzeugung direktpositiver Bilder und Verfahren dafür
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

Also Published As

Publication number Publication date
DE2133868A1 (de) 1972-03-02
GB1335851A (en) 1973-10-31
JPS5434329B1 (de) 1979-10-26
FR2101617A5 (de) 1972-03-31
US3759713A (en) 1973-09-18
BE769752A (fr) 1972-01-10

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