Patent ID: 7496304

Claim:
An image forming apparatus that forms a color image by overlapping toners of a plurality of colors, on the basis of a plurality of image data corresponding to the plurality of colors, the apparatus comprising: setting means for setting a thick paper mode in which an image is to be formed on thick paper, in contrast to an ordinary paper mode in which an image is to be formed on ordinary paper, on the basis of the plurality of image data corresponding to the plurality of colors; and γ correction means for subjecting the plurality of image data to γ correction based on a γ correction value; image forming means for forming an image based on the image data subjected to the γ correction; and control means for executing a control to change a γ correction value for the ordinary paper mode to a γ correction value for the thick paper mode, to thereby reduce a maximum toner attachment amount of each of the toners of the plurality of toners, and set the same fixation temperature condition as in the ordinary paper mode.