PURPOSE: To provide a negative charge toner excellent in low temperature fixing property, offset resistant property, blocking resistant property and abra sion charging property and enabling stable and excellent developing operation and fixing operation.
CONSTITUTION: In a toner (t) including at least a binder resin and a coloring agent, the binder resin is composed of a mixture of a binding agent resin of at least an MI value 10-30(g/10 minute) with a binding agent resin of an acid value 20-60(KOHmg/g) at a weight ratio of 30:70 to 95:5. The binding agent resin, of which the MI value is prescribed, is selected to function principally in low temperature fixing property and offset resisting property in fixing, while the binding agent resin, of which the acid value is prescribed, is selected to function principally in friction charging property. This toner (t) is stored in a storing part 3 to be conveyed by developing rollers 5, 6 to visualize an electrostatic latent image.
UEDA SHINJIRO
HIRASE KATSUNORI
TAKIGAWA YOSHIO
