ELEKTROGRAPHISCHER ENTWICKLER SOWIE TRAEGERKOMPONENTE ZUR HERSTELLUNG DESSELBEN

Electrographic carrier particles with improved conductivity and stability are prepared from magnetic stainless steel particles of at least 9 weight percent chromium content. The particles are passivated by reaction with nitric acid. This forms a chromium-rich, stable film on the particle surfaces. B...

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Bibliographic Details
Main Author TIMOTHY MISKINIS,EDWARD
Format Patent
LanguageGerman
Published 22.01.1981
Subjects
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Summary:Electrographic carrier particles with improved conductivity and stability are prepared from magnetic stainless steel particles of at least 9 weight percent chromium content. The particles are passivated by reaction with nitric acid. This forms a chromium-rich, stable film on the particle surfaces. Before passivation the particles may also be treated, e.g., with hydrofluoric acid, to remove surface silicon. The passivated particles, preferably after thinly coating with a resin, e.g., poly(vinylidene fluoride), are mixed with toner powder for electrographic dry development.
Bibliography:Application Number: DE19803023815