Image forming apparatus utilizing plural pressers of different weights and image forming method forming an image with the image forming apparatus

摘要

An image forming apparatus, including:plural image bearers bearing toner images including a black toner image, which are developed with a two-component developer including a carrier and a toner comprising a binder resin and an additive; a receptor receiving the toner images; plural pressers each pressing 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×100wherein A represents a BET specific surface area (cm²/g) of the toner; and B represents a BET specific surface area (cm²/g) of the toner after buried, and 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.