Patent ID: 9665027
Date: 2017-05-30
CPC Classifications: G03G

Claim:
1. An image forming system, comprising: an image former configured to form an image with a white coloring material and a colored coloring material; an output controller configured to control the image former, in a calibration process, to output a first calibration sheet formed with the colored coloring material, and a second calibration sheet including a first layer formed with the colored coloring material and a second layer formed with the white coloring material overlying the first layer; a density measurer configured to measure density information of each of the first calibration sheet and the second calibration sheet; a first corrector that corrects a gradation of the colored coloring material on the basis of the measured color density of the first calibration sheet bearing the first layer formed with the colored coloring material and with no white coloring material formed on the first layer; a second corrector that corrects a gradation of the white coloring material on the basis of the measured color density of the second calibration sheet including the first layer formed, on the second calibration sheet, with a gradation value corresponding to the corrected gradation of the colored coloring material already corrected by the first corrector; and a designated value receiver to receive a user-designated value of coloring material to be consumed in the calibration process in view of dependency of calibration accuracy on coloring material consumption in the calibration process, wherein the output controller controls, based on the user-designated value, an amount of coloring material consumed by the image former to form the image on the second calibration sheet.