DE709873C - Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines - Google Patents

Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines

Info

Publication number
DE709873C
DE709873C DEI64794D DEI0064794D DE709873C DE 709873 C DE709873 C DE 709873C DE I64794 D DEI64794 D DE I64794D DE I0064794 D DEI0064794 D DE I0064794D DE 709873 C DE709873 C DE 709873C
Authority
DE
Germany
Prior art keywords
aid
oxocarbocyanines
silver halide
halide emulsions
photographic silver
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
DEI64794D
Other languages
German (de)
Inventor
Dr Hermann Boedeker
Dr Adolf Sieglitz
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI64794D priority Critical patent/DE709873C/en
Application granted granted Critical
Publication of DE709873C publication Critical patent/DE709873C/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
    • G03C1/06—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

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)

Description

Verfahren zur Sensibilisierung photographischer Halogensilberemulsionen mit Hilfe votr Oxdcarbocyaninen Es ist bekannt, zur Grünsensi@bilisierung photographischer Emulsionen Benzoxocarbocyanine zu verwenden. Solche Sensibilisierungen mit N, N'-Diätliyloxocarl)ocvaninjodid sind in .den Spektrogrammen II und III der Abbildung wiedergegeben. Spektrogramm I entspricht .der Spektralempfindlichkeit der unsensibilisierten Emulsion. Für die Sensibilisierung nach Spektrogramm II sind 15 mg, für diejenige nach Spektrogramm III 30 mh dieses bekannten Farbstoffes pro mg Emulsion benutzt worden.Process for sensitizing photographic silver halide emulsions with the aid of oxide carbocyanines It is known to use benzoxocarbocyanines for green sensitization of photographic emulsions. Such sensitizations with N, N'-dietliyloxocarl) ocvaninjodid are shown in the spectrograms II and III of the figure. Spectrogram I corresponds to the spectral sensitivity of the unsensitized emulsion. For the sensitization according to Spectrogram II 15 mg, for that according to Spectrogram III 30 mh of this known dye per mg of emulsion were used.

In nicht zu erwartender Weise hat sich nun erfindungsgemäß ergeben, (1a1 Beiizoxocarl)oc@-anine, ciie in der 6, 6'-Stellttng durch das Alkvl substituiert sind, eine erheblich höhere Grünempfindlichkeit und einen besonders steilen Abfall der Sensibilisierttngskurvenach den längeren Wellenlängen aufweisen. Diese Wirkung ist in Spektrogramm IV erläutert. Solche Sensibifisierungen sind vorzüglich für hochorthochromatische Emulsionen zu verwenden, die trotz höchster Grünempfindlichkeit und sehr hoher Allgemeinempfindlichkeit bei einem sehr hellen Dunkelkammerlicht verarbeitet werden können.In a way that was not to be expected, according to the invention it has now been found that (1a1 Beiizoxocarl) oc @ -anine, ciie in the 6, 6 'position by the alkvl are substituted, have a significantly higher green sensitivity and a particularly steep drop in the sensitization curve after the longer wavelengths. This effect is explained in Spectrogram IV. Such sensitizations are ideal for highly orthochromatic emulsions which, despite the highest green sensitivity and very high general sensitivity, can be processed in a very bright darkroom light.

Die Alkylgruppe an den Stickstoffatomen der Heteroringe kann in diesen Farbstoffen durch die üblichen Alkyle, wie Methyl, Äthyl, Propy i, Butyl, Amyl, Isoamyl usw., gebildet «-erden.The alkyl group on the nitrogen atoms of the hetero rings can be in these Dyes by the usual alkyls, such as methyl, ethyl, propy i, butyl, amyl, Isoamyl, etc., formed «-grounds.

Der Farbstoff, dessen sensibilisierende Wirkung in Spektogramm IV wiedergegeben ist, hat folgende Zusammensetzung Der Sensibilisierungsbereich erstreckt sich hier zwischen etwa 5oo und 54.o .in,tc mit einem Maximum bei 53o m,u.The dye, the sensitizing effect of which is shown in Spectogram IV, has the following composition The sensitization range here extends between about 500 and 54.o .in, tc with a maximum at 53o m, u.

Die Farbstoffe werden üblicherweise der Emulsion entweder bei der Herstellung oder nachträglich im Badeverfahren einverleibt.The dyes are usually the emulsion either in the Manufactured or subsequently incorporated in the bathing process.

Claims (1)

PATENTANSPRUCH: Verfahren zur Sensibilisierung photographischer Halogensilberemulsionen mit Hilfe von Oxocarbocyaninen, dadurch gekennzeichnet, daB Benzoxocarbocyanine verwendet werden, die in .der 6, h -Stellung durch den Alkylrest substituiert sind. PATENT CLAIM: Process for sensitizing photographic halogen silver emulsions with the aid of oxocarbocyanines, characterized in that benzoxocarbocyanines are used which are in the 6, h -position by the alkyl radical are substituted.
DEI64794D 1939-06-10 1939-06-10 Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines Expired DE709873C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI64794D DE709873C (en) 1939-06-10 1939-06-10 Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI64794D DE709873C (en) 1939-06-10 1939-06-10 Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines

Publications (1)

Publication Number Publication Date
DE709873C true DE709873C (en) 1941-08-28

Family

ID=7196203

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI64794D Expired DE709873C (en) 1939-06-10 1939-06-10 Process for sensitizing photographic silver halide emulsions with the aid of oxocarbocyanines

Country Status (1)

Country Link
DE (1) DE709873C (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0278509A2 (en) * 1987-02-12 1988-08-17 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
US4889796A (en) * 1986-12-27 1989-12-26 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
US5198332A (en) * 1986-11-27 1993-03-30 Fuji Photo Film Co. Ltd. Silver halide photographic emulsion

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5198332A (en) * 1986-11-27 1993-03-30 Fuji Photo Film Co. Ltd. Silver halide photographic emulsion
US4889796A (en) * 1986-12-27 1989-12-26 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
EP0278509A2 (en) * 1987-02-12 1988-08-17 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion
EP0278509A3 (en) * 1987-02-12 1989-08-02 Fuji Photo Film Co., Ltd. Silver halide photographic emulsion

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