| 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%: <?in-line-formulae description="In-line Formulae" end="lead"?>X=(A-B)/Ax100<?in-line-formulae description="In-line Formulae" end="tail"?> wherein 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.
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