Black iron-based particles comprise a FeTiO3Fe2O3 solid solution or a mixed composition of a FeTiO3Fe2O3 solid solution and an iron-based oxide having a spinel structure, and having a Ti content of from more than 10.0 atm % to 40.0 atm %, calculated as Ti, based on whole Fe, and a blackness (L* value)...http://www.google.fr/patents/US20040131852?utm_source=gb-gplus-shareBrevet US20040131852 - Black iron-based particles and black toner containing the same
Black iron-based particles and black toner containing the same
Numéro de demande: 10/686,776 Numéro de publication: US 2004/0131852 A1 Date de dépôt: 17 oct. 2003 Brevet délivré: US6844067 ( Date de délivrance 18 janv. 2005)