Patent ID: 8592116

Claim:
A toner to develop an electrostatic charge image, the toner comprising: a binder resin including: a first binder resin having a first weight-average molecular weight; and a second binder resin having a second weight-average molecular weight different than the first weight-average molecular weight; a colorant; and a releasing agent, wherein the toner has at least one endothermic peak corresponding to melting of the releasing agent, and the at least one endothermic peak is obtained by differential scanning calorimetry (DSC) and includes a main endothermic peak in a temperature range of about 80 to about 100° C. and a secondary endothermic peak in a temperature range of about 60 to about 80° C., and wherein a molecular weight distribution curve of the toner obtained by using the gel permeation chromatography (GPC) method on the tetrahydrofuran (THF) soluble fraction includes a main peak in a molecular weight range of about 10,000 to about 30,000 g/mol and a shoulder starting point in a molecular weight range of about 100,000 to about 300,000 g/mol, and characteristics of the molecular weight distribution curve of the toner include: an amount of molecules having a molecular weight greater than 5,000,000 g/mol is about 0.1 to about 1 wt % based on a total weight of the THF soluble fraction, an amount of molecules having a molecular weight in a range of 1,000,000 g/mol to 5,000,000 g/mol is about 0.5 to about 3 wt % based on the total weight of the THF soluble fraction, an amount of molecules having a molecular weight in a range of 100,000 g/mol to 500,000 g/mol is about 3 to about 10 wt % based on the total weight of the THF soluble fraction, and an amount of molecules having a molecular weight of 20,000 g/mol or less is about 45 to about 70 wt % based on the total weight of the THF soluble fraction.