TONER, DEVELOPER, AND IMAGE FORMATION DEVICE

摘要

A toner including: a pigment; polyester resin A that is insoluble in tetrahydrofuran (THF); and polyester resin B that is soluble in THF, wherein the toner satisfies requirements (1) to (3) below:
(1) the polyester resin A includes one or more aliphatic diols including from 3 through 10 carbon atoms, as a component constituting the polyester resin A;
(2) the polyester resin B includes at least an alkylene glycol in an amount of 40 mol% or more, as a component constituting the polyester resin B; and
(3) a glass transition temperature (Tglst) of the toner at first heating in differential scanning calorimetry (DSC) of the toner is from 20°C through 50°C.