Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Osamu Ieda0
Date of Patent
June 2, 2009
0Patent Application Number
115898450
Date Filed
October 31, 2006
0Patent Primary Examiner
Patent abstract
The present invention aims to provide a toner for developing electrostatic image which is excellent in image reproducibility and further in cleaning performance. A toner for developing electrostatic image comprising a colored particle containing a binder resin and a colorant, and an external additive, wherein the toner for developing electrostatic image has a volume average particle diameter of 4.0 to 8.0 μm and an average circularity of 0.940 to 0.980, and wherein the toner for developing electrostatic image has a uniaxial collapsing stress of 0.8 to 1.5 kPa and an internal frictional angle of 30 to 45° when a maximum consolidation stress is 0.
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