Abstract: A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m2/g and contains particles in a rectangular parallelepiped shape and wherein the hydrophobic silica contains hydrophobic silica A that has at least a BET specific surface area of 150-300 m2/g and the surface of which has been treated with an aminosilane and hexamethyldisilazane and hydrophobic silica B that has at least a BET specific surface area of 90-150 m2/g and the surface of which has been treated with hexamethyldisilazane.

Abstract: A toner for electrophotography includes toner particles containing at least a binder resin and a colorant, to which strontium titanate and hydrophobic silica as external additives are admixed, wherein the strontium titanate has a BET specific surface area of 20-50 m2/g and contains particles in a rectangular parallelepiped shape and wherein the hydrophobic silica contains hydrophobic silica A that has at least a BET specific surface area of 150-300 m2/g and the surface of which has been treated with an aminosilane and hexamethyldisilazane and hydrophobic silica B that has at least a BET specific surface area of 90-150 m2/g and the surface of which has been treated with hexamethyldisilazane.

Abstract: The present invention relates to a toner and a two-component developer which can produce high quality images with decreasing the dependence on environment and the back ground during continuous printing of a large number of sheets. The toner includes toner particles including a binder resin as a main component thereof and having particle surfaces deposited with titanium oxide particles, the surfaces of which are treated with at least isobutyl trimethoxy silane and trimethyl siloxysilicate. The two-component developer includes the toner and a carrier including core particles, the surfaces of which are coated with a resin coating agent including 5 to 20 percent by weight of carbon black, relative to the total weight of the resin coating agent.

Abstract: The present invention relates to a toner and a two-component developer which can produce high quality images with decreasing the dependence on environment and the back ground during continuous printing of a large number of sheets. The toner includes toner particles including a binder resin as a main component thereof and having particle surfaces deposited with titanium oxide particles, the surfaces of which are treated with at least isobutyl trimethoxy silane and trimethyl siloxysilicate. The two-component developer includes the toner and a carrier including core particles, the surfaces of which are coated with a resin coating agent including 5 to 20 percent by weight of carbon black, relative to the total weight of the resin coating agent.

Abstract: A toner for electrophotography, which contains a binder resin having a low softening point so that the toner can be fixed at a low temperature, and which is free from blocking, the toner comprisingtoner matrix particles containing a binder resin containing a resin having an epoxy group, and a colorant, anda cured coating formed from the resin having an epoxy group in the presence of a curing agent,the toner matrix particles being surface-covered with the cured coating.