Patent ID: 7672616

Claim:
An image forming apparatus comprising: an image carrier configured to carry an image; a latent-image forming unit configured to form a latent image on said image carrier; a first developing unit configured to develop the latent image by a first toner; a second developing unit configured to develop the latent image by a second toner which is of the same hue as that of the first toner and has a higher optical density than that of the first toner; and a control part configured to control said first and second developing units so as to form a first region, a second region and a third region on said image carrier, wherein the first region is one in which the second toner is used but the first toner is not used, the second region is one in which the first and second toners are used, and the third region is one in which at a boundary of the first and second regions, the first toner is used but the second toner is not used.