Magnetic core material for electrophotographic developer, carrier for electrophotographic developer, and developer
AssigneePowdertech Co., Ltd.
InventorsHiroki Sawamoto, Tetsuya Uemura
Life of this patent
Estimating the term…
Abstract
Provided are a magnetic core material for electrophotographic developer and a carrier for electrophotographic developer, which are excellent in charge characteristics and strength and with which a satisfactory image free from defects can be obtained, and a developer containing the carrier. A magnetic core material for electrophotographic developer, having a sulfur component content of from 50 to 700 ppm in terms of a sulfate ion and a BET specific surface area of from 0.06 to 0.25 m2/g.
Claims5
A magnetic core material for electrophotographic developer, having a sulfur component content of from 50 to 700 ppm in terms of a sulfite ion and a BET specific surface area of from 0.06 to 0.25 m2/g, wherein the sulfur component content is from 80 to 500 ppm in terms of a sulfate ion.
Dependencies are inferred from the claim text.