Patent ID: 8518621

Claim:
A toner for electrostatic image development comprising: a resin binder, a negatively chargeable charge control agent, and a positively chargeable charge control agent, wherein the resin binder comprises a polyester A obtained by polycondensing a carboxylic acid component comprising isophthalic acid and/or an ester thereof and an alcohol component, and a polyester B obtained by polycondensing a carboxylic acid component comprising fumaric acid and/or an ester thereof and an alcohol component, wherein the polyester A and the polyester B are in a weight ratio, polyester A/polyester B, of from 90/10 to 30/70, and wherein the negatively chargeable charge control agent comprises a metal-containing azo dye and/or a metal complex of salicylic acid, and wherein the toner has a softening point of from 90° to 120° C.