MAGNETIC DEVELOPER AND RECOGNITION METHOD OF MAGNETIC-INK CHARACTER

摘要

The invention relates to a magnetic developer comprising a magnetic toner containing at least a binder resin, a magnetic material and a hydrocarbon wax,wherein said magnetic toner has such properties that: a DSC curve of the toner measured by the use of a differential scanning calorimeter is characterized in that with an endothermic peak in raising temperature, its onset temperature is 105 DEG C or below and its peak temperature is in the range of from 100 DEG C to 120 DEG C, and that with an exothermic peak in dropping temperature its peak temperature is in the range of from 62 DEG C to 75 DEG C and its peak intensity ratio is 5 x 10<-><3> or more; and said magnetic material has such properties that: a residual magnetization sigma r is in the range of from 12 emu/g to 30 emu/g and a coercive force Hc is in the range of from 130 oersteds to 300 oersteds in a magnetic field of 10,000 oersteds.