Magenta toner for electrophotography and full color image formation method

摘要

A magenta toner for electrophotography includes a binder resin and a colorant, wherein the toner contains at least a naphthol pigment having a structure represented by the following general formula (1) as the colorant, and has a shape factor SF1 of 110 to 140 obtained by the equation below and a volume average particle size of 2 to 9 mu m: wherein R represents the following group, and R' represents a hydrogen atom, an alkyl group or a methoxy group; SF1 = R<2>/A x pi /4 x 100 wherein R represents the maximum length of the toner and A represents the projected area of the toner.