CH355026A - Photographic material having a direct positive emulsion layer - Google Patents

Photographic material having a direct positive emulsion layer

Info

Publication number
CH355026A
CH355026A CH355026DA CH355026A CH 355026 A CH355026 A CH 355026A CH 355026D A CH355026D A CH 355026DA CH 355026 A CH355026 A CH 355026A
Authority
CH
Switzerland
Prior art keywords
emulsion layer
photographic material
direct positive
positive emulsion
direct
Prior art date
Application number
Other languages
German (de)
Inventor
Max Dr Coenen
Johannes Dr Goetze
Ulrich Dr Grisar
Oskar Dr Riester
Werner Dr Stracke
Karl Dr Zietan
Original Assignee
Agfa Ag
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 Agfa Ag filed Critical Agfa Ag
Publication of CH355026A publication Critical patent/CH355026A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00—Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/06—Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups three >CH- groups, e.g. carbocyanines
    • 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
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes
    • G03C1/14—Methine and polymethine dyes with an odd number of CH groups
    • G03C1/18—Methine and polymethine dyes with an odd number of CH groups with three CH groups
    • 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
    • G03C1/4853—Direct positive emulsions prefogged characterised by the desensitiser polymethine dyes
    • 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)
  • Organic Chemistry (AREA)
  • Indole Compounds (AREA)
  • Plural Heterocyclic Compounds (AREA)
CH355026D 1956-03-19 1957-03-18 Photographic material having a direct positive emulsion layer CH355026A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEA24514A DE1008118B (en) 1956-03-19 1956-03-19 Process for the sensitization of direct-positive emulsions containing color formers

Publications (1)

Publication Number Publication Date
CH355026A true CH355026A (en) 1961-06-15

Family

ID=6925685

Family Applications (1)

Application Number Title Priority Date Filing Date
CH355026D CH355026A (en) 1956-03-19 1957-03-18 Photographic material having a direct positive emulsion layer

Country Status (6)

Country Link
US (1) US2930694A (en)
BE (1) BE555921A (en)
CH (1) CH355026A (en)
DE (1) DE1008118B (en)
FR (1) FR1177726A (en)
GB (1) GB825965A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE566164A (en) * 1957-03-28
BE636671A (en) * 1960-05-13
US3501310A (en) * 1966-03-11 1970-03-17 Eastman Kodak Co Direct positive silver halide emulsions containing compounds which accept electrons and spectrally sensitize the emulsion
US3510348A (en) * 1966-03-11 1970-05-05 Eastman Kodak Co Direct positive recording film
CH482782A (en) * 1967-10-19 1969-12-15 Eastman Kodak Co Process for the manufacture of trimethine cyanines with indole rings
US3541089A (en) * 1967-10-19 1970-11-17 Eastman Kodak Co Method of preparing chain-substituted trimethine indole dyestuffs
US3501312A (en) * 1968-07-22 1970-03-17 Eastman Kodak Co Direct positive silver halide emulsions containing trimethine cyanine dyes
GB1456243A (en) * 1973-01-25 1976-11-24 Agfa Gevaert Directpositive silver halide elements
IT988269B (en) * 1973-06-18 1975-04-10 Minnesota Mining & Mfg CYANINE DYES AND THEIR USE AS SPECTRAL SENSITIZERS IN DIRECT POSITIVE PHOTOGRAPHIC MATERIALS OF THE SPECTRALLY SENSITIZED HERSCHEL EFFECT TYPE

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2126078A (en) * 1932-04-26 1938-08-09 Agfa Ansco Corp Sensitizing photographic emulsion
BE484580A (en) * 1947-08-29
BE529197A (en) * 1953-05-28

Also Published As

Publication number Publication date
BE555921A (en)
GB825965A (en) 1959-12-23
DE1008118B (en) 1957-05-09
FR1177726A (en) 1959-04-29
US2930694A (en) 1960-03-29

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