Patent ID: 8192910

Claim:
An image forming method, comprising: charging a surface of an electrostatic latent image bearer by a charger; irradiating a surface of the electrostatic latent image bearer by an irradiator to form an electrostatic latent image thereon; developing the electrostatic latent image by an image developer with a toner to form a toner image; transferring the toner image onto a recording medium by a transferer; and fixing the toner image on the recording medium by a fixer, wherein: the charger comprises a charging roller contacting the electrostatic latent image bearer to charge the electrostatic latent image bearer, having a ten-point surface roughness Rz of from 5 to 30; the toner comprises a binder resin, a colorant, a release agent and an external additive; the external additive comprises a composite oxide comprising titanium oxide and silicon oxide; the composite oxide has a core-shell structure comprising a core comprising the titanium oxide and a shell comprising the silicon oxide; the titanium oxide is present in an amount from 80 to 95% by weight; and the composite oxide has a BET specific surface area of from 50 to 100 m 2 /g.