Printing method and printer

A printing apparatus comprising:

• a printing unit which performs printing on a medium by changing dot size;
• a reading unit which reads the printed medium;
• and
• a control unit which prompts a test pattern, in which a plurality of pixel rows including a plurality of pixels arranged in a predetermined direction are arranged in a direction intersecting the predetermined direction, to be printed on a kind of medium;
• obtains a density correction value for each pixel row on the basis of the read result of the test pattern and creates a correction value table in which each pixel row is associated with each correction value;
• prompts a test pattern, to which the correction value table for the kind of medium is applied, to be printed on another kind of printing target medium different from the kind of the printing target medium by changing dot size;
• prompts a dot size, in which a density deviation is in a predetermined range and granularity is in an allowable range, to be selected on the basis of the read result of the reading unit reading which is obtained the test pattern printed on the printing target medium;
• and prompts each pixel row to be corrected by the correction value table using the selected dot size when the printing is performed on the printing target medium.