Electrostatic charge image developing toner and production method thereof

Toner for developing an electrostatic image which hardly causes an offset phenomenon and a wrapping phenomenon and which excels in anti-fusing property, and the production process thereof is provided. The toner for developing an electrostatic image contains at least a binder resin and a colorant, in which the binder resin contains an amorphous resin and a crystalline resin, and an endothermal peak having an onset temperature of a starting point ranging from 100 to 150 DEG C, an onset temperature of an end point ranging from 150 to 200 DEG C, and a half value width ranging from 10 to 40 DEG C is present in a DSC curve while elevating the temperature measured by a differential scanning calorimeter of the toner. This toner can be produced by performing a heat-melt kneading at the temperature defined as T ( DEG C) having the range specified by the following furmula: (T m - 20) T (T m + 30), in which the formula, T m represents the melting point ( DEG C) of said crystalline resin. And the toner has at least one maximum peak +- within a temperature range of 150 to 250 DEG C and at least one maximum peak within a temperature range of 50 to 150 DEG C in the temperature dependency curve of the tangent of the loss angle (tan ') according to dynamic viscoelasticity measurement.An electrostatic charge image developing toner being difficult to cause an offset phenomenon and a twining phenomenon, and excellent in fusion resistance; and a production method therefor. The electrostatic charge image developing toner, wherein bonding resin contains non-crystalline resin and crystalline resin, the on-set temperature of a starting point is 100-150 DEG C and that of a terminating point is 150-200 DEG C on a DSC curve at a rise in toner temperature, and a heat absorbing peak having a half width of 10-40 DEG C is present. This toner can be produced with a fusing/mixing temperature T( DEG C) set as (Tm-20)=T=(Tm+30) (Tm; crystalline resin melting point).