1. A density determination method comprising: a first process of discharging ink onto a medium to print a plurality of colorimetric patches having mutually different densities on the medium so as to allow each of the colorimetric patches to include a base portion serving as a background of the each of the colorimetric patches and a low density portion forming a symbol and having a density lower than a density of the base portion, and; a second process of acquiring images each associated with a corresponding one of the colorimetric patches; and a third process of determining a maximum printing density value for the medium on the basis of a result of recognizing the symbol through each of the images, having been acquired in the second process.