GB403974A - Sensitization of photographic silver halide emulsions and manufacture of a sensitising dye therefor - Google Patents

Sensitization of photographic silver halide emulsions and manufacture of a sensitising dye therefor

Info

Publication number
GB403974A
GB403974A GB21141/33A GB2114133A GB403974A GB 403974 A GB403974 A GB 403974A GB 21141/33 A GB21141/33 A GB 21141/33A GB 2114133 A GB2114133 A GB 2114133A GB 403974 A GB403974 A GB 403974A
Authority
GB
United Kingdom
Prior art keywords
silver halide
halide emulsions
sensitization
manufacture
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
GB21141/33A
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
Publication of GB403974A publication Critical patent/GB403974A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B23/00Methine or polymethine dyes, e.g. cyanine dyes
    • C09B23/02Methine or polymethine dyes, e.g. cyanine dyes the polymethine chain containing an odd number of >CH- or >C[alkyl]- groups
    • C09B23/06Methine 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Hydrogenated Pyridines (AREA)

Abstract

A carbocyanione dyestuff having sensitising action on photographic silver halide emulsions is prepared by condensing tetraethylorthocarbonic ester with a quaternary ammonium compound of 2-methylbenzselenazole in the presence of piperidine and alcohol. The silver halide emulsion may be bathed with an alcohol solution of the dyestuff, or the latter may be added to the emulsion before it is cast. The emulsion acquires a sensitivity of 500m m to 690m m .
GB21141/33A 1931-06-27 1932-06-27 Sensitization of photographic silver halide emulsions and manufacture of a sensitising dye therefor Expired GB403974A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE403974X 1931-06-27

Publications (1)

Publication Number Publication Date
GB403974A true GB403974A (en) 1933-12-27

Family

ID=6420186

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21141/33A Expired GB403974A (en) 1931-06-27 1932-06-27 Sensitization of photographic silver halide emulsions and manufacture of a sensitising dye therefor

Country Status (3)

Country Link
BE (1) BE389458A (en)
FR (1) FR742639A (en)
GB (1) GB403974A (en)

Also Published As

Publication number Publication date
BE389458A (en)
FR742639A (en) 1933-03-10

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