Patent ID: 7745085

Claim:
A toner for developing an electrostatic latent image, comprising a crystalline polyester resin, a non-crystalline polyester resin and a release agent, wherein: an acid value of the crystalline polyester resin is within a range from 5 to 10 mgKOH/g; an acid value of the non-crystalline polyester resin is within a range from 10 to 15 mgKOH/g; a melting temperature of the crystalline polyester resin determined in accordance with ASTM D3418-8 is within a range from 50 to 120° C.; a weight average molecular weight (Mw) of the crystalline polyester resin is within a range from 10,000 to 25,000; a glass transition temperature (Tg) of the non-crystalline polyester resin determined in accordance with ASTM D3418-8 is 50° C. or higher; a weight average molecular weight (Mw) of the non-crystalline polyester resin is within a range from 20,000 to 50,000; a weight ratio between the crystalline polyester resin and the non-crystalline polyester resin is within a range from 5/95 to 40/60; and structures in which the crystalline polyester resin contacts the release agent exist in a ruthenium-stained cross section of the toner, and if a cross-sectional area of the structures is labeled A, a cross-sectional area of lone portions of the release agent is labeled B, and a cross-sectional area of lone portions of the crystalline polyester resin is labeled C, then 40≦100×A/(A+B+C)≦70, 10≦100×B/(A+B+C)≦30, and 20≦100×C/(A+B+C)≦30.