Magnetic toner and method of manufacturing magnetic toner

Details Magnetic toner and method of manufacturing magnetic toner Magnetic toner and method of manufacturing magnetic toner

2008-05-13

2008-05-13

Dote, Janis L. (Department: 1795)

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

C430S108400, C430S137170

Reexamination Certificate

active

07371494

ABSTRACT:
The present invention provides a magnetic toner which is hardly influenced by an environment, and with which an image with high quality and excellent resolution can be stably even under low humidity. In the magnetic toner of present invention:I) a ratio of an iron element content to a carbon element content present on the toner particle surface is less than 0.0010;II) 50 number % or more of toner particles satisfy a relationship of D/C≦0.02 (C: projected area diameter of toner particles, D: minimum value for a distance between a magnetic iron oxide fine particle and the toner particle surface); andIII) 40-95 number % of toner particles satisfy a structure where 70 number % or more of the magnetic iron oxide fine particles in the respective toner particles are present up to a depth of 0.2 time as far as C from the toner particle surface.

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