| abstract |
PROBLEM TO BE SOLVED: To show good fixing properties, excellent offset resistance even in a surf fixing method, excellent charging stability, high image density even in long-term use in a high temperature and high humidity environment, and a ghost-free magnetic property To provide toner. A magnetic toner having a weight average particle diameter of 3 to 10 μm produced by polymerizing a monomer composition containing at least a polymerizable monomer, magnetic iron oxide, and a release agent, The average circularity of the magnetic toner is 0.970 or more, The radius of inertia Rw and absolute molecular weight Mw in the size exclusion chromatography-online-multi-angle light scattering (SEC-MALLS) measurement of the magnetic toner-soluble o-dichlorobenzene are expressed by the following formula: 0.1 × 10 −4 ≦ Rw / Mw ≦ 5.0 × 10 −4 (Formula 1) It is characterized by satisfying. [Selection figure] None |