Electrophotographic developing agent

The invention provides an electrophotographic developing agent including an untreated toner including a binding resin, a black colorant, and a charge controlling agent, and an external additive added to a surface of the untreated toner, wherein the black colorant includes a titanium oxide. According...

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Bibliographic Details
Main Author CHOI SEOK HOON,KIM SANG DEOK,LEE DUCK HEE
Format Patent
LanguageEnglish
Published 20.06.2007
Subjects
ADHESIVES
CHEMISTRY
CINEMATOGRAPHY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
DYES
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INORGANIC CHEMISTRY
MAGNETOGRAPHY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
PAINTS
PHOTOGRAPHY
PHYSICS
POLISHES
PREPARATION OF CARBON BLACK
TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES
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Summary:The invention provides an electrophotographic developing agent including an untreated toner including a binding resin, a black colorant, and a charge controlling agent, and an external additive added to a surface of the untreated toner, wherein the black colorant includes a titanium oxide. Accordingly, the electrophotographic developing agent has good mixing properties, dispersion properties, and heat resistance while maintaining proper image concentration. Also, the electrophotographic developing agent can be employed in an electrophotographic image forming apparatus.
Bibliography:Application Number: CN20061169305