| abstract |
PROBLEM TO BE SOLVED: To provide a two-component developer having excellent environmental tribo stability and durable image stability. A two-component developer containing a toner and a magnetic carrier, the toner has a toner core and toner particles having a shell layer formed on the surface of the toner core, and the toner core contains a binder resin. However, the shell layer contains a thermosetting resin bonded to the binder resin in a specific structure, the magnetic carrier has a resin coating layer on the surface, and in the surface analysis of the magnetic carrier, on the surface of the magnetic carrier. The ratio N1 of nitrogen atom, the ratio S1 of silicon atom and the ratio F1 of fluorine atom, and the ratio N2 of nitrogen atom, the ratio S2 of silicon atom and the ratio F2 of fluorine atom at a depth of 40 nm from the surface of the magnetic carrier are as follows. A two-component developer that satisfies the formula. 0.10 ≤ N1 ≤ 1.50 0.30 ≤ S1 ≤ 5.00 45.00 ≤ F1 ≤ 65.00 S1 <S2 S1 / N1 <S2 / N2 F1> F2 [Selection diagram] None |