Patent ID: 7122286
Filing Date: 2006-10-17
Classification: G03G

Abstract:
1. A toner for developing a latent electrostatic image to a toner image, said toner comprising (a) a binder resin, and (b) a magnetic material which is blackened by coating the surface of a magnetic powder with a coloring agent, said magnetic material being in an amount of 10 wt. % to 40 wt. % of the entire weight of said toner, wherein said binder resin in said toner comprises a polyester resin and has such a molecular weight distribution that has at least one peak within a range of 1,000 to 10,000 in said molecular weight distribution and a half peak width of 15,000 or less in terms of the molecular weight thereof, which molecular weight distribution is determined by subjecting a THF-soluble component contained in said toner to gel permeation chromatography (GPC), and said toner contains therein a THF-insoluble component in an amount of 2 wt. % to 40 wt. % of said toner.