| abstract |
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic one-component toner composition, in particular a magnetic toner base particle comprising a binder resin, a magnetic substance, and a charge control agent, a hydrophobized specific surface area of 20 to 80 m 2 / g, hydrophobized specific surface area Even when using a developing roller with 130 to 230 m 2 / g hydrophobic silica and a fine metal oxide powder, the surface of which is worn out, the fluidity of the toner is not only smooth, but also uniform charging is possible. The present invention relates to a magnetic one-component toner capable of preventing image contamination due to the generation of a wavy pattern on a sleeve, which is a developing roller, by uniformly forming a toner layer on the developing roller. |