Patent ID: 7575840
Filing Date: 2009-08-18
Classification: G03G

Abstract:
1. A magnetic toner which internally contains magnetic particles and develops an electrostatic latent image, wherein: said magnetic particle is of average particle size 0.01 μm through 0.50 μm; said magnetic particle is of octahedron shape that is a convex polyhedron surrounded by eight triangles as a basis, each of vertexes and edges of the octahedron being in a curved surface shape and having a portion that can be taken as a straight line on the outer periphery of a projected image of said octahedron; a sphericity of said magnetic toner is 0.94 through 0.98; and a number content of said toner of particle size 0.6 μm through 2.0 μm is smaller than 10%.