GB1441612A - Method of making photographic silver halide materials - Google Patents

Method of making photographic silver halide materials

Info

Publication number
GB1441612A
GB1441612A GB268773A GB268773A GB1441612A GB 1441612 A GB1441612 A GB 1441612A GB 268773 A GB268773 A GB 268773A GB 268773 A GB268773 A GB 268773A GB 1441612 A GB1441612 A GB 1441612A
Authority
GB
United Kingdom
Prior art keywords
silver halide
silver
halide
emulsions
emulsion
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
GB268773A
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.)
Kodak Ltd
Original Assignee
Kodak 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 Kodak Ltd filed Critical Kodak Ltd
Priority to GB268773A priority Critical patent/GB1441612A/en
Priority to DE19742402130 priority patent/DE2402130C3/en
Priority to BE139995A priority patent/BE809950A/en
Priority to JP799674A priority patent/JPS581408B2/en
Priority to US502695A priority patent/US3917485A/en
Publication of GB1441612A publication Critical patent/GB1441612A/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
    • G03C1/48538—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure
    • 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
    • G03C1/015—Apparatus or processes for the preparation of emulsions
    • 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
    • G03C1/035—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein characterised by the crystal form or composition, e.g. mixed grain
    • G03C2001/03535—Core-shell grains
    • 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
    • G03C2200/00—Details
    • G03C2200/06—Additive

Landscapes

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

Abstract

1441612 Internally-sensitive photographic silver halide emulsions KODAK Ltd 18 Jan 1974 [18 Jan 1973 29 March 1973] 2687/73 Heading G2C Photographic silver halide emulsions having internal sensitivity are made by laying down further silver halide on to the grains of a surface sensitive or surface fogged silver halide emulsion by making alternate additions of silver ions and halide ions. Thereto such that alternate excesses of silver and halide ions are produced in the emulsion. Depending on the number of cycles of alternate excesses of silver and halide ion, the emulsions may show some surface and some internal sensitivity or only internal sensitivity, the latter requiring 7-20 cycles. The desensitizing effect of certain optically sensitizing dyes on the original emulsion is reduced or eliminated by the layer of further silver halide laid down. The internally sensitive silver halide emulsions obtained as above give direct positive images on image-wise exposure and development with a fogging developer.
GB268773A 1973-01-18 1973-01-18 Method of making photographic silver halide materials Expired GB1441612A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB268773A GB1441612A (en) 1973-01-18 1973-01-18 Method of making photographic silver halide materials
DE19742402130 DE2402130C3 (en) 1973-01-18 1974-01-17 Process for the preparation of a silver halide photographic emulsion containing internally sensitive silver halide grains
BE139995A BE809950A (en) 1973-01-18 1974-01-18 Photographic emulsion with internally sensitised grains - mfd by pptn of silver halide on surface sensitised or fogged grains by alternate addn. of excess silver halide ions
JP799674A JPS581408B2 (en) 1973-01-18 1974-01-18 Shin-halogen storage case
US502695A US3917485A (en) 1973-01-18 1974-09-03 Method of making photographic silver halide emulsions and products thereof

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB268773A GB1441612A (en) 1973-01-18 1973-01-18 Method of making photographic silver halide materials
GB1512773 1973-03-29

Publications (1)

Publication Number Publication Date
GB1441612A true GB1441612A (en) 1976-07-07

Family

ID=26237669

Family Applications (1)

Application Number Title Priority Date Filing Date
GB268773A Expired GB1441612A (en) 1973-01-18 1973-01-18 Method of making photographic silver halide materials

Country Status (3)

Country Link
JP (1) JPS581408B2 (en)
DE (1) DE2402130C3 (en)
GB (1) GB1441612A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539290A (en) * 1983-09-27 1985-09-03 E. I. Du Pont De Nemours And Company Process for pulsed flow, balanced double jet precipitation
US4666669A (en) * 1983-09-27 1987-05-19 E. I. Du Pont De Nemours And Company Apparatus for pulsed flow, balanced double jet precipitation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63264740A (en) * 1986-12-22 1988-11-01 Fuji Photo Film Co Ltd Silver halide photographic sensitive material
JPH0769579B2 (en) * 1987-11-26 1995-07-31 富士写真フイルム株式会社 Silver halide photographic light-sensitive material
US5156946A (en) * 1988-05-30 1992-10-20 Fuji Photo Film Co., Ltd Silver halide photographic materials
GB8821433D0 (en) * 1988-09-13 1988-10-12 Ciba Geigy Ag Photographic emulsions
EP0376500B1 (en) * 1988-12-27 1994-04-13 Ilford Ag Process for the spectral sensitisation of a silver halide emulsion
EP0382950B1 (en) * 1989-02-17 1995-05-10 Agfa-Gevaert N.V. Process for the production of silver halide emulsions

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4539290A (en) * 1983-09-27 1985-09-03 E. I. Du Pont De Nemours And Company Process for pulsed flow, balanced double jet precipitation
US4666669A (en) * 1983-09-27 1987-05-19 E. I. Du Pont De Nemours And Company Apparatus for pulsed flow, balanced double jet precipitation

Also Published As

Publication number Publication date
DE2402130A1 (en) 1974-08-01
JPS581408B2 (en) 1983-01-11
DE2402130C3 (en) 1980-08-21
JPS49106321A (en) 1974-10-08
DE2402130B2 (en) 1979-12-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee