IMAGE FORMING APPARATUS, CARTRIDGE, AND STORING DEVICE MOUNTED TO THE CARTRIDGE

摘要

An image forming apparatus operates in a first image formation mode for forming an image on an image bearing member by using developer under a first predetermined image forming condition and a second image formation mode for forming an image on an image bearing member by using developer under a second image forming condition which is different from the first predetermined image forming condition. The apparatus is set so that the amount of consumption of developer for forming an image in the second image formation mode is smaller than the amount of consumption used for forming an identical image in the first image formation mode. The apparatus includes a storing device for storing information for setting the second image forming condition corresponding to a plurality of levels of the amount of usage of the image bearing member, and a controller for changing the second image forming condition in the second image formation mode depending on the amount of usage of the image bearing member and information stored in the storing device.