An image processing method is applied for recording an image on a recording medium using a plurality of color materials including a chromatic material and an achromatic material. A total amount of recording of the chromatic material is smaller than a total amount of recording of the achromatic material, and a plurality of monochrome modes including a first monochrome mode and a second monochrome mode are provided, the total amount of recording of the chromatic material being different for each of the monochrome modes. The image processing method includes adjusting the amount of recording of the achromatic material so that a recording density of an image recorded in the first monochrome mode and a recording density of an image recorded in the second monochrome mode become equivalent to each other with respect to the same luminance signal.