Carrier for electrophotographic developer, method for manufacturing the carrier, developer including the carrier, container including the developen, and image forming apparatus using the developer wherein the carrier satisfies the relationship 1.0<=C2/C1<=1.3

摘要

A carrier for electrophotographic developer, including a magnetic core material whose surface is coated with a resin, wherein the carrier satisfies the following relationship:1.0<=C2/C1<=1.3wherein C1 represents a charge quantity of a developer (1) including the carrier and a first toner after the developer (1) is subjected to a frictional charge treatment once, wherein concentration of the first toner in the developer (1) is 3% by weight; and C2 represents a charge quantity of a developer (2) including the carrier, which has been separated from the developer (1) subjected to the frictional charge treatment, and a second toner when the charge quantity is measured after the developer (2) is subjected to the frictional charge treatment once, wherein concentration of the second toner in the developer (2) is 3% by weight, wherein the first and second toner are the same or different.