GB1431606A - Direct-positive silver halide emulsions - Google Patents

Direct-positive silver halide emulsions

Info

Publication number
GB1431606A
GB1431606A GB5895773A GB5895773A GB1431606A GB 1431606 A GB1431606 A GB 1431606A GB 5895773 A GB5895773 A GB 5895773A GB 5895773 A GB5895773 A GB 5895773A GB 1431606 A GB1431606 A GB 1431606A
Authority
GB
United Kingdom
Prior art keywords
nucleus
dyes
cyanine
alkyl
optionally substituted
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
GB5895773A
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.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
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 Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of GB1431606A publication Critical patent/GB1431606A/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
    • G03C1/485—Direct positive emulsions
    • G03C1/48515—Direct positive emulsions prefogged
    • G03C1/48523—Direct positive emulsions prefogged characterised by the desensitiser

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

1431606 Cyanine dyes FUJI PHOTO FILM CO Ltd 19 Dec 1973 [19 Dec 1972] 58957/73 Heading C4P [Also in Divisions G2 and G3] Dimethine cyanine dyes for sensitizing directpositive silver halide emulsions are sensitized with a dimethine cyanine dye having a pyrrolo- [2,2-b]-pyridine nucleus bonded in its 3-position through a dimethin chain to (a) the 4-position of a quinoline or pyridine nucleus, (b) the 1- or 3-position of an isoquinoline nucleus, or (c) the 2-position of any cyanine heterocylic nucleus. Preferred dyes are of formula (in which R<SP>1</SP> is H or optionally substituted 1-5 C alkyl; R<SP>2</SP> is H, optionally substituted 1-5 C alkyl or aryl; R<SP>3</SP> is 1-6 C alkyl, substituted alkyl, allyl or aryl; L<SP>1</SP> is methine; L<SP>2</SP> is optionally substituted methine and may complete a methylene chain with R<SP>3</SP>; m and n are each 0 or 1; X is an anion; Z completes a cyanine heterocyclic nucleus. The dyes are prepared by a conventional condensation reaction. In specified dyes Z completes a benzothiazole, benzoselenazole, benzoxazole, 3,3<SP>1</SP>-dimethylindole or imidazo-[4,5-b]-quinoxaline nucleus which may be nitro-substituted; R<SP>1</SP> is CH 3 or H; R<SP>2</SP> is methyl, ethyl, phenyl or H; R<SP>3</SP> is methyl, ethyl, sulphopropyl or 3<SP>1</SP>-sulphobutyl.
GB5895773A 1972-12-19 1973-12-19 Direct-positive silver halide emulsions Expired GB1431606A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12757472A JPS5547373B2 (en) 1972-12-19 1972-12-19

Publications (1)

Publication Number Publication Date
GB1431606A true GB1431606A (en) 1976-04-14

Family

ID=14963404

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5895773A Expired GB1431606A (en) 1972-12-19 1973-12-19 Direct-positive silver halide emulsions

Country Status (4)

Country Link
US (1) US3925085A (en)
JP (1) JPS5547373B2 (en)
DE (1) DE2363216A1 (en)
GB (1) GB1431606A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52120824A (en) * 1976-04-02 1977-10-11 Mitsubishi Paper Mills Ltd Halogenated silver emulsion for direct positive
JPS5321601A (en) * 1976-08-10 1978-02-28 Mitsubishi Paper Mills Ltd Improved offset printing plate
US4097285A (en) * 1977-02-17 1978-06-27 Mitsubishi Paper Mills, Ltd. Direct-positive photographic silver halide emulsion containing novel dye
US4259439A (en) * 1977-10-28 1981-03-31 Mitsubishi Paper Mills, Ltd. Direct positive silver halide emulsion
US4701398A (en) * 1984-04-09 1987-10-20 E. I. Du Pont De Nemours And Company Photographic film containing direct positive dyes made from 3-indolizine carboxaldehyde
US4614801A (en) * 1984-04-09 1986-09-30 E. I. Du Pont De Nemours And Company Direct positive dyes made from 3-indolizine carboxaldehyde
JPH0789207B2 (en) * 1988-07-25 1995-09-27 富士写真フイルム株式会社 Direct positive silver halide emulsion
JP4068809B2 (en) * 2001-02-01 2008-03-26 富士フイルム株式会社 Photopolymerizable composition and recording material

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3598595A (en) * 1968-02-15 1971-08-10 Eastman Kodak Co Silver halide emulsions sensitized with cyanine dyes containing a pyrrolo(2,3-b) quinoxaline or pyrrolo(2,3-b)pyrazine nucleus
US3767651A (en) * 1968-07-22 1973-10-23 Eastman Kodak Co Novel cyanine dyes derived from 1,2-diphenylindoles
JPS5437490B2 (en) * 1971-12-24 1979-11-15

Also Published As

Publication number Publication date
US3925085A (en) 1975-12-09
JPS5547373B2 (en) 1980-11-29
DE2363216A1 (en) 1974-07-04
JPS4984640A (en) 1974-08-14

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee