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 thereforInfo
- 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
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
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 .
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) |
-
0
- BE BE389458D patent/BE389458A/xx unknown
- FR FR742639D patent/FR742639A/fr not_active Expired
-
1932
- 1932-06-27 GB GB21141/33A patent/GB403974A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE389458A (en) | |
FR742639A (en) | 1933-03-10 |
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