Direktpositivemulsionen mit verbesserter Strahlungsempfindlichkeit

Direct-positive photographic elements are described which comprise uniformly fogged radiation-sensitive silver halide and a selenium compound of the formula : R - Se - Q wherein R is alkyl, aralkyl, alkaryl, aryl or a heterocyclic ring system and Q represents -Se-R' or -S-R' wherein R'...

Full description

Saved in:
Bibliographic Details
Main Authors LEOPOLD,FLORENS,RAYMOND, JOSEPH,POLLET,ROBERT
Format Patent
LanguageGerman
Published 21.10.1971
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
ELECTROGRAPHY
HETEROCYCLIC COMPOUNDS
HOLOGRAPHY
METALLURGY
ORGANIC CHEMISTRY
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:Direct-positive photographic elements are described which comprise uniformly fogged radiation-sensitive silver halide and a selenium compound of the formula : R - Se - Q wherein R is alkyl, aralkyl, alkaryl, aryl or a heterocyclic ring system and Q represents -Se-R' or -S-R' wherein R' has one of the significances given for R, halogen, cyano, or WHEREIN EACH OF R1, R2 and R3 is alkyl, aralkyl or aryl and X<-> is an anion but does not exist when R itself contains an anionic group. The selenium compounds increase the speed of the direct-positive silver halide elements.
Bibliography:Application Number: DE19712113346