VERFAHREN ZUR VERHINDERUNG DER BILDUNG VON KONTAKTFLECKEN AUF PHOTOGRAPHISCHEN MATERIALIEN

In a process for preventing the contact spots formed by contact of the back coating of photographic material with the emulsion side an aqueous polymer dispersion obtained by polymerization of halogen-free compounds and polyvinyl alcohol or partially acetylated polyvinyl alcohol in the presence of an...

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Bibliographic Details
Main Authors MORCHER,BERNHARD,DR, KOLB,GUENTER,DR
Format Patent
LanguageGerman
Published 21.07.1977
Edition2
Subjects
AUXILIARY PROCESSES IN PHOTOGRAPHY
CHEMISTRY
CINEMATOGRAPHY
COMPOSITIONS BASED THEREON
ELECTROGRAPHY
HOLOGRAPHY
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES
PHOTOGRAPHY
PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES
PHYSICS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:In a process for preventing the contact spots formed by contact of the back coating of photographic material with the emulsion side an aqueous polymer dispersion obtained by polymerization of halogen-free compounds and polyvinyl alcohol or partially acetylated polyvinyl alcohol in the presence of an anionic emulsifier are added to the casting composition applied as outermost back coating and/or as uppermost layer.
Bibliography:Application Number: DE19762601377