CA988351A - Photographic process utilizing polymethine sensitizers and nucleating agents for direct positive emulsions - Google Patents

Photographic process utilizing polymethine sensitizers and nucleating agents for direct positive emulsions

Info

Publication number
CA988351A
CA988351A CA122,438A CA122438A CA988351A CA 988351 A CA988351 A CA 988351A CA 122438 A CA122438 A CA 122438A CA 988351 A CA988351 A CA 988351A
Authority
CA
Canada
Prior art keywords
polymethine
sensitizers
nucleating agents
process utilizing
photographic process
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
CA122,438A
Other languages
English (en)
Other versions
CA122438S (en
Inventor
John Spence
Donald E. Janssen
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 Eastman Kodak Co filed Critical Eastman Kodak Co
Application granted granted Critical
Publication of CA988351A publication Critical patent/CA988351A/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
    • G03C1/48546—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent
    • G03C1/48561—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure characterised by the nucleating/fogging agent hydrazine compounds
    • 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
    • G03C1/48584—Direct positive emulsions non-prefogged, i.e. fogged after imagewise exposure spectrally sensitised

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
CA122,438A 1970-10-30 1971-09-09 Photographic process utilizing polymethine sensitizers and nucleating agents for direct positive emulsions Expired CA988351A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US8570570A 1970-10-30 1970-10-30

Publications (1)

Publication Number Publication Date
CA988351A true CA988351A (en) 1976-05-04

Family

ID=22193408

Family Applications (1)

Application Number Title Priority Date Filing Date
CA122,438A Expired CA988351A (en) 1970-10-30 1971-09-09 Photographic process utilizing polymethine sensitizers and nucleating agents for direct positive emulsions

Country Status (6)

Country Link
JP (1) JPS511416B1 (enExample)
BE (1) BE774656A (enExample)
CA (1) CA988351A (enExample)
DE (1) DE2154028C3 (enExample)
FR (1) FR2113370A5 (enExample)
GB (1) GB1371366A (enExample)

Also Published As

Publication number Publication date
BE774656A (fr) 1972-02-14
JPS511416B1 (enExample) 1976-01-17
DE2154028B2 (de) 1973-07-05
DE2154028C3 (de) 1974-01-31
DE2154028A1 (de) 1972-05-04
FR2113370A5 (enExample) 1972-06-23
GB1371366A (en) 1974-10-23

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