COLOR IMAGE FORMING APPARATUS AND COLOR IMAGE FORMING METHOD HAVING OVERLAPPING TONERS

摘要

In a digital copying machine according to an image forming apparatus of the invention, when a "thick paper" mode is set through an operation panel, a main CPU sets a gradient of gamma for "thick paper" in a gamma correction unit of an image processing unit. Thus, a toner attachment amount is controlled and changed from 1.6 mg/cm² to 1.0 mg/cm², thereby widening a fixation temperature range for good fixation.