Density determination method, density determination apparatus, density determination program, and program recording medium

A program recording medium configured to record a density determination program that allows a computer incorporated in or coupled to a printing apparatus that performs printing by discharging ink onto a medium to execute processing and to be readable by the computer comprising:

• a process of printing 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;
• a process of acquiring images each associated with a corresponding one of the colorimetric patches, printed on the medium;
• and
• a 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 acquired images.