Patent ID: 8741518

Claim:
A toner comprising: toner particles each containing a binder resin; a colorant; and a carboxy-containing styrene-based resin; wherein the toner particles are produced in an aqueous medium; and the toner particles contain 50.0% by mass or more of a styrene-acrylic-based resin component with respect to the total mass of the toner particles; wherein when a content of cyclohexane insoluble matter in the toner after subjecting the toner to a Soxhlet extraction with cyclohexane for 4 hours, is defined as cyclohexane insoluble matter A, and a content of cyclohexane insoluble matter in the toner after subjecting the toner to a Soxhlet extraction with cyclohexane for 24 hours, is defined as cyclohexane-insoluble matter B, wherein the cyclohexane-insoluble matter A and B are calculated from the following expression: cyclohexane insoluble matter (%)=([ W 2 −W 3 ]/[W 1 −W 3])×100 where, W1 represent a mass of a sample of the toner, W2 represents a mass of an extract residue of the sample of the toner, which is obtained by subjecting the sample of the toner to the Soxhlet extraction, and W3 represents a mass of an incineration ash of the sample of the toner, which is obtained by subjecting the sample of the toner to heating at about 900° C. for about 3 hours, cyclohexane-insoluble matter A is 70.0% by mass or more; and cyclohexane-insoluble matter B is 40.0% by mass or less, and wherein: z-average molecular weight Mz and the weight-average molecular weight Mw of a tetrahydrofuran-soluble matter of the carboxy-containing styrene-based resin, determined by gel permeation chromatography measurement, satisfy the following expressions: 10000≦Mw≦30000; 1.62≦Mz/Mw≦5.00.