Printing apparatus and printing method

A printing apparatus comprising:

• a printing head including a nozzle row in which a plurality of nozzles configured to eject a droplet to a medium are disposed side by side;
• a control unit configured to control movement of at least one of the medium and the printing head in a scanning direction intersecting an arrangement direction of the plurality of nozzles, and ejection of the droplet from the printing head;
• and
• a reading unit configured to read a density of a printing surface of the medium in a unit of a reading resolution, wherein
• the printing apparatus forms a test pattern for correcting printing characteristics on the medium and corrects the printing characteristics based on a reading result of the test pattern obtained by the reading unit,
• the control unit acquires moire characteristics information for determining whether moire of a reading density due to an interference between an arrangement of a plurality of dots included in the test pattern and the reading resolution at the reading unit occurs,
• when the moire characteristics information does not indicate occurrence of the moire, the control unit controls the ejection of the droplet such that the test pattern is formed on the medium N1 times, N1 being an integer of 1 or more, and
• when the moire characteristics information indicates occurrence of the moire, the control unit controls the ejection of the droplet such that the test pattern is formed on the medium N2 times, N2 being an integer greater than N1.