Patent ID: 8301064

Claim:
An image forming apparatus, comprising: plural image bearers configured to bear toner images comprising a black toner image, which are developed with a two-component developer comprising a carrier and a toner including a binder resin and an additive; a recepter configured to receive the toner images; plural pressers each configured to press the receptor to each of the plural image bearers at a predetermined pressure, wherein the additive has a burial rate X indicated by the following formula not less than 40%: X =( A−B )/ A ×100 wherein A represents a BET specific surface area (cm 2 /g) of the toner before the additive is buried therein and is not greater than 3 m 2 /g; and B represents a BET specific surface area (cm 2 /g) of the toner after the additive is buried, wherein one of the pressers pressing the receptor to the image bearer bearing the black toner image presses the receptor thereto at a pressure lower than those of the other pressers, wherein each of the pressers includes a pressing member contacting the receptor, configured to press the receptor to each of the image bearers, and wherein the predetermined pressure of each presser is generated by a weight of each presser, and wherein the weight of the plural pressers is different between two or more pressers.