TONER FOR ELECTROPHOTOGRAPHY, AND DEVELOPING AGENT, IMAGE FORMATION DEVICE AND IMAGE FORMATION METHOD USING THE SAME

摘要

A toner for electrophotography, characterized in that it comprises particles containing manganese and iron and having a hematite structure, and a binding resin, wherein the particles have a manganese content of 3 to 30 wt %, an average particle diameter of 0.01 to 2.0 mum and a saturation magnetization (sigmas) of 2 emu/g or less. The toner for electrophotography can be produced with ease, and also is excellent in developing characteristics and is capable of forming an image having satisfactory density and excellent fixing property, since it uses a black pigment which has substantially week or no magnetism and has a specific particle diameter, as a coloring material.