| 摘要 |
<p>PURPOSE: To provide a full color developer which is excellent in environmental stability and paint resistance, is provided with a small fluctuation width for a toner charge quantity, and is suitable for a developing method in which alternating current bias and direct current bias are superimposed on each other. CONSTITUTION: A full color developer used in a full color image forming method, in which an electrostatic latent image formed on an electrostatic latent image carrier is developed under a developing bias consisting of superimposed alternate current constituent and a direct current constituent and a toner image is formed for every predetermined color variety, consists of a toner and a carrier. In the toner, anatase type titania, which is provided with an average primary grain diameter of 10-90nm and is treated with a hydrophobic agent, is externally added to a coloring resin grain consisting of polyester resin, which has a specific acid value, Mn, Mw/Mn, a glass transition point, and a softening point, and a coloring agent. In the carrier, a magnetic core grain is covered by resin prepared by polymerizing monomers containing organopolysiloxane.</p> |
