A magnetic toner containing 100 parts by weight of magnetic Fe.sup.2+ -containing iron oxide particles having an average particle size of 0.05 to 0.30 .mu.m, containing not less than 0.9 atm % and less than 1.7 atm % of silicon, calculated as Si, based on Fe, having a substantially cubic shape...http://www.google.fr/patents/US5843610?utm_source=gb-gplus-shareBrevet US5843610 - Magnetic particles for magentic toner and process for producing the same
Magnetic particles for magentic toner and process for producing the same
