GB1431606A - Direct-positive silver halide emulsions - Google Patents
Direct-positive silver halide emulsionsInfo
- 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
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.
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)
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)
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 |
-
1972
- 1972-12-19 JP JP12757472A patent/JPS5547373B2/ja not_active Expired
-
1973
- 1973-12-19 GB GB5895773A patent/GB1431606A/en not_active Expired
- 1973-12-19 US US426145A patent/US3925085A/en not_active Expired - Lifetime
- 1973-12-19 DE DE19732363216 patent/DE2363216A1/en not_active Withdrawn
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 |