MISREGISTRATION JUDGING METHOD, REGISTRATION MARK FOR COLOR PRINTING, COLOR SLIPPAGE DETECTION MARK, COLOR SLIPPAGE CORRECTION CHART, COLOR REGISTRATION CORRECTION CHART COLOR SLIPPAGE DETECTION METHOD COLOR SLIPPAGE CORRECTION

摘要

A misregistration judging method, registration mark for color printing, color slippage detection mark, color slippage correction chart, color registration correction chart, color slippage detection method color slippage correction method, and color image forming apparatus are provided. The color image forming apparatus prints registration marks for color printing respectively including marks of reference colors and marks of colors for measurement that are centered at same positions and having similar figures and judges any relative positional displacement, if any, of a mark of a reference color and the corresponding mark of the color for measurement as misregistration.