Patent ID: 7695880

Claim:
A toner comprising colored particles containing at least a binder resin and a colorant, and two or more external additives, wherein at least one of the external additives is composed of mesoporous particles subjected to hydrophobic treatment with a treating agent containing substituted or unsubstituted amino group, and the mesoporous particles of the external additive have a BET specific surface area of 400 m 2 /g or more and 1,000 m 2 /g or less, and wherein primary particles of the mesoporous particles of the external additive (a) have an average particle size of 0.2 μm or more and 1.7 μm or less and (b) are inorganic particles of at least one selected from the group consisting of silica, titanium oxide, alumina, cerium oxide, and strontium titanate.