MAGNETIC TONER AND ELECTROPHOTOGRAPHIC METHOD

摘要

PURPOSE:To attain a high picture quality having a high image density and a low surface fogging by using a magnetic toner composed of a specific binding resin, a specific charge controlling agent and a magnetic material having a specific static bulk density. CONSTITUTION:The magnetic toner is constituted of at least a binding resin, magnetic material and charge controlling agent. The binding resin has 1.0X10<4>-2.0X10<7> storage elastic modulus and constituted of a styrene-based polymer consisting essentially of styrene, a mixture of the styrene based polymer consisting essentially of styrene or the like. The charge controlling agent is constituted of at least a metal complex dye expressed by the formula. In the formula, X represents nitro group, sulfonamide group or a halogen atom, Y represents hydrogen atom, a halogen atom or nitro group, (where, excepting that both X and Y are nitro group), M represents chromium or cobalt atom. And the magnetic material is composed of a magnetic material particle having >=0.6g/cm<3> static bulk density. The mentioned magnetic toner is used.