DE677637C - Process for sensitizing halide silver emulsions - Google Patents

Process for sensitizing halide silver emulsions

Info

Publication number
DE677637C
DE677637C DEI54835D DEI0054835D DE677637C DE 677637 C DE677637 C DE 677637C DE I54835 D DEI54835 D DE I54835D DE I0054835 D DEI0054835 D DE I0054835D DE 677637 C DE677637 C DE 677637C
Authority
DE
Germany
Prior art keywords
silver emulsions
sensitizing
halide silver
emulsions
sensitizing halide
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
DEI54835D
Other languages
German (de)
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 DEI54835D priority Critical patent/DE677637C/en
Application granted granted Critical
Publication of DE677637C publication Critical patent/DE677637C/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

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  • 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)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Description

Verfahren zur Sensibilisierung von Halogensilberemulsionen Es ist bereits bekannt, zur Sensibilisierung von Halogensilberemulsionen das einfache Selenocarbocyanin zu verwenden.Process for sensitizing halide silver emulsions It is already known, the simple selenocarbocyanine for the sensitization of halogen silver emulsions to use.

Es wurde nun gefunden, daß die Benzselenocarbocyanine, die in der 5, 6-Stellung des Benzolringes Methylgruppen und in der Mesostellung der T'rimethinkette eine Alkylgruppe enthalten, wertvolle Sensibilisatoren sind, welche hinsichtlich der Sensibilisierung für Rot das unsubstituierte Selenocarbocyanin übertreffen. Es zeigt sich insbesondere, daß gerade die Substitution in 5- und 6-Stellung das Sensibilisierungsvermögen günstiger beeinflußt als die Substitution in anderen Stellungen. Die Farbstoffe, welche in dem vorliegenden Verfahren zur Anwendung kommen, leiten sich von der Formel ab. In dieser Formel sind R1, R2, Rs, R4 Methyl, R" Ra Alkyl, und X ist Cl, Br, J, S 04 C H3, C'104 oder ein anderer Säurerest.It has now been found that the benzselenocarbocyanines, which contain methyl groups in the 5, 6-position of the benzene ring and an alkyl group in the meso position of the trimethine chain, are valuable sensitizers which outperform unsubstituted selenocarbocyanine in terms of sensitization to red. It is shown in particular that the substitution in the 5- and 6-position has a more favorable effect on the sensitization capacity than the substitution in other positions. The dyes used in the present process are derived from the formula away. In this formula, R1, R2, Rs, R4 are methyl, R "Ra are alkyl, and X is Cl, Br, J, S 04, C H3, C'104, or another acid residue.

Die Verarbeitung der Emulsionen geschieht in bekannter Weise. Die Sensibilisatoren können entweder während der Emulsionsherstellung zugesetzt oder der Emulsionssch:icht im Badeverfahren einverleibt werden.The emulsions are processed in a known manner. the Sensitizers can either be added during emulsion preparation or the emulsion layer cannot be incorporated in the bathing process.

Im folgenden werden Beispiele von Farbstoffen gemäß der Erfindung angegeben. i. i, i'-Diäthyl-5, 6, 5', 6'-tetramethylbenzselenomesomethylcarbocyaninjodid. a. i, i'-Dipropyl-5, 6, 5', 6'-tetramethylbenzselenomesomethylcarbocyaninjodid. Diese beidenFarbstoffe weisen insbesondere auch eine weitgehende S chließung derGrünlücke auf.Examples of dyes according to the invention are given below. i. i, i'-Diethyl-5, 6, 5 ', 6'-tetramethylbenzselenomesomethylcarbocyaninine iodide. a. i, i'-Dipropyl-5, 6, 5 ', 6'-tetramethylbenzelenomesomethylcarbocyaninine iodide. In particular, these two dyes also largely close the green gap.

Claims (1)

PATRNTANSPRUCIi: Verfahren zur Sensibilisierung von Halogensilberemulsionen, gekennzeichnet durch die Verwendung von Benzselenocarbocyaninen, welche in beiden- Benzselenazolringen in 5,6-Stellung durch Methylgruppen und in der Mesostellung der Trimethinkette durch Alkylgruppen substituiert sind.PATRNTANSPRUCIi: Process for sensitizing halogen silver emulsions, characterized by the use of Benzselenocarbocyaninen, which in both- Benzselenazole rings in the 5,6-position through methyl groups and in the meso position of the trimethine chain are substituted by alkyl groups.
DEI54835D 1932-04-26 1932-04-27 Process for sensitizing halide silver emulsions Expired DE677637C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI54835D DE677637C (en) 1932-04-26 1932-04-27 Process for sensitizing halide silver emulsions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE418745X 1932-04-26
DEI54835D DE677637C (en) 1932-04-26 1932-04-27 Process for sensitizing halide silver emulsions

Publications (1)

Publication Number Publication Date
DE677637C true DE677637C (en) 1939-06-29

Family

ID=25910743

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI54835D Expired DE677637C (en) 1932-04-26 1932-04-27 Process for sensitizing halide silver emulsions

Country Status (1)

Country Link
DE (1) DE677637C (en)

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