GB1452170A - Sensitized silver halide photographic emulsions - Google Patents
Sensitized silver halide photographic emulsionsInfo
- Publication number
- GB1452170A GB1452170A GB1663874A GB1663874A GB1452170A GB 1452170 A GB1452170 A GB 1452170A GB 1663874 A GB1663874 A GB 1663874A GB 1663874 A GB1663874 A GB 1663874A GB 1452170 A GB1452170 A GB 1452170A
- Authority
- GB
- United Kingdom
- Prior art keywords
- methyl
- silver halide
- grains
- hydroxy
- supersensitized
- 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
- G03C1/06—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
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)
Abstract
1452170 Supersensitized photographic silver halide emulsions FUJI PHOTO FILM CO Ltd 16 April 1974 [16 April 1973] 16638/74 Heading G2C A supersensitized photographic light-sensitive silver halide emulsion comprises (a) grains of lightsensitive silver halide a sufficient proportion of which have a crystal habit of a (100) surface so as to permit the emulsion to be supersensitized, the most frequently occurring diameter of the grains being 0À7 micron or less and the grains containing 5 mole % or less of iodide, (b) adsorbed on the grain surfaces a sensitizing amount of at least one dye which spectrally sensitizes the silver halide and which has a reduction potential more negative than -0À7 volt and (c) a supersensitizing amount of at least one azaindene having at least one nitrogen atom in the 6-membered ring of the indene nucleus. The iodide may be incorporated into the silver halide grains after their formation by means of the halide conversion method, and metallic ions such as Ru, Rh, Pd, Ir, Pt and Co may also be contained in the grains. The sensitizing dyes used are cyanines or merocyanines and the tetrazaindenes may be of the Formula:- where R is H or methyl and may be optionally substituted by chloro or carboxy in 5-position or methyl or hydroxymethyl in 2-position. Other azaindenes are 4-amino-6-methyl-1,3,3a,7-tetrazaindene and its 5-ethyl analogue, 4-hydroxy-6- methyl-1,3a,7-triazaindene, 2-methyl-4-hydroxy- 6-methyl-3,3a,7-triazaindene, 7-hydroxy-1,2,3,4,6- pentazaindenes substituted by amino or methyl in 5-position, 5,7-diamino-1,2,3,4,6-pentazaindene and 4-hydroxy-6-methyl-1,2,3,3a,7-pentazaindene. Additional supersensitizing compounds may be present.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4285573A JPS49130220A (en) | 1973-04-16 | 1973-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1452170A true GB1452170A (en) | 1976-10-13 |
Family
ID=12647620
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1663874A Expired GB1452170A (en) | 1973-04-16 | 1974-04-16 | Sensitized silver halide photographic emulsions |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS49130220A (en) |
AU (1) | AU6782774A (en) |
DE (1) | DE2418278A1 (en) |
GB (1) | GB1452170A (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0789206B2 (en) * | 1986-04-08 | 1995-09-27 | 富士写真フイルム株式会社 | Silver halide photographic light-sensitive material and ultrahigh contrast negative image forming method using the same |
IT1189111B (en) * | 1986-05-08 | 1988-01-28 | Minnesota Mining & Mfg | RADIOGRAPHIC ELEMENTS WITH A REDUCED CROSS-OVER AND REDUCED RESIDUAL COLORING |
JPH07119976B2 (en) * | 1986-08-07 | 1995-12-20 | コニカ株式会社 | Silver halide color photographic light-sensitive material capable of rapid processing and excellent in antifoggant effect |
JPH07119978B2 (en) * | 1986-08-07 | 1995-12-20 | コニカ株式会社 | Silver halide color photographic light-sensitive material capable of rapid processing and excellent in antifoggant effect. |
JPS6389838A (en) * | 1986-10-03 | 1988-04-20 | Fuji Photo Film Co Ltd | Silver halide photographic sensitive material |
JPH06105342B2 (en) * | 1986-12-01 | 1994-12-21 | 富士写真フイルム株式会社 | Silver halide light-sensitive material sensitized with a luminescent dye |
JPH0711685B2 (en) * | 1986-12-01 | 1995-02-08 | 富士写真フイルム株式会社 | Silver halide photosensitive material |
JPS63197934A (en) * | 1987-02-12 | 1988-08-16 | Fuji Photo Film Co Ltd | Silver halide photosensitive material subjected to spectral sensitization by light emittable dye |
JPH0711686B2 (en) * | 1987-02-12 | 1995-02-08 | 富士写真フイルム株式会社 | Silver halide photosensitive material spectrally sensitized with a luminescent dye |
JP2604157B2 (en) * | 1987-05-28 | 1997-04-30 | 富士写真フイルム株式会社 | Silver halide photographic material |
US5252454A (en) * | 1987-10-19 | 1993-10-12 | Fuji Photo Film Co., Ltd. | Silver halide photographic material |
-
1973
- 1973-04-16 JP JP4285573A patent/JPS49130220A/ja active Pending
-
1974
- 1974-04-11 AU AU67827/74A patent/AU6782774A/en not_active Expired
- 1974-04-16 DE DE19742418278 patent/DE2418278A1/en not_active Withdrawn
- 1974-04-16 GB GB1663874A patent/GB1452170A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
AU6782774A (en) | 1975-10-16 |
JPS49130220A (en) | 1974-12-13 |
DE2418278A1 (en) | 1974-10-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3287136A (en) | Light-developable silver halide emulsions | |
GB1452170A (en) | Sensitized silver halide photographic emulsions | |
US2410690A (en) | Method of improving the sensitivity characteristics of emulsions | |
US3706566A (en) | Photographic emulsion containing optically dye-sensitized silver halide grains of less than 0.2 micron | |
GB1317139A (en) | Spectrally sensitized silver halide photographic emulsions | |
JPH024241A (en) | Silver halide thermal development type photographic emulsion | |
US3922170A (en) | Spectrally sensitized silver halide photographic emulsion | |
US3901714A (en) | Silver halide emulsions and elements including sensitizers of adamantane structure | |
US4040841A (en) | Silver halide photographic emulsion | |
US3563754A (en) | Photographic process | |
JPS62262039A (en) | Silver halide photographic material | |
US4039335A (en) | Photographic silver halide emulsions | |
US3994733A (en) | Silver halide photographic emulsion | |
GB1457818A (en) | Sensitized silver halide photographic emulsion and material containing the emulsion | |
US4057430A (en) | Silver halide photographic emulsion | |
US3764340A (en) | Spectrally sensitized silver halide photographic emulsion | |
US3600183A (en) | Light-sensitive material | |
US4047964A (en) | Spectrally sensitized silver halide photographic emulsion | |
JPH0464059B2 (en) | ||
US3706569A (en) | Silver halide emulsion containing silver ethynylcyclopentanol complex to reduce desensitization of optical sensitizing dye incorporated therein | |
GB1355853A (en) | Spectrally sensitized silver halide photographic emulsions | |
GB1529753A (en) | Spectrally supersensitized silver halide photographic emulsions | |
US3579348A (en) | Direct-print silver halide emulsions | |
US3776739A (en) | Spectrally sensitized silver halide photographic emulsion | |
US3672905A (en) | Novel dyes and photographic emulsions |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |