A magnetic toner having a specific surface area of not more than 3.0 m.sup.2 /g computed by the Brunauer Emmett Teller equation and the number of molecules of CO.sub.2 gas, being equal to 100/nm.sup.2 to 1000/nm.sup.2, adsorbed by the toner is provided. The triboelectrification of magnetic toner particles...http://www.google.com.au/patents/US5561018?utm_source=gb-gplus-sharePatent US5561018 - Magnetic toner
