CARRIER CORE MATERIAL FOR ELECTROPHOTOGRAPHIC DEVELOPER, ITS METHOD FOR MANUFACTURING, CARRIER AND ITS METHOD FOR MANUFACTURING, AND ELECTROPHOTOGRAPHIC DEVELOPER USING THE CARRIER

摘要

PROBLEM TO BE SOLVED: To provide a carrier core material for an electrophotographic developer and its method for manufacturing for controlling true density and/or apparent density by having excellent strength in the form of true spheres, and to provide a carrier, its method for manufacturing, and the electrophotographic developer using the carrier. SOLUTION: Concerning the carrier core material for the electrophotographic developer and the carrier for the electrophotographic developer for covering a resin on the surface of the carrier core material, the carrier core material includes hollow particles of 3-100 number% containing iron of 36-78 wt.%. Their methods for manufacturing, and the electrophotographic developer using the carrier are employed. COPYRIGHT: (C)2010,JPO&INPIT