Patent ID: 6534229
Filing Date: 2003-03-18
Classification: G03G

Abstract:
A developer for electrostatic image development comprising colored resin particles comprising at least a binder resin and a colorant, and a magnetic carrier, said binder resin being a polyester resin, wherein a proportion of said colored resin particles having a particle diameter in a range of from 12 &mgr;m to 16 &mgr;m, inclusive, in said developer and a specific charge amount of said colored resin particles meet the following expression (1):5.18+0.12Ã—A(where A represents a proportion (% by volume) of colored resin particles having a particle diameter in a range of from 12 &mgr;m to 16 &mgr;m, inclusive, and B represents a specific charge amount Q/M (&mgr;C/g) of colored resin particles having a particle diameter in a range of from 12 &mgr;m to 16 &mgr;m, inclusive).