Inkjet printing apparatus, method for manufacturing printed matter, program, and recording medium

An inkjet printing apparatus comprising:

• a head configured to eject ultraviolet light ink which hardens if being subjected to irradiation with light, onto a recording medium;
• irradiators configured to irradiate the ink ejected from the head, with light;
• and
• an irradiation controller configured to control light irradiation of the irradiators,
• wherein the head is configured to relatively reciprocate with respect to a mounting table for mounting the recording medium,
• the plurality of irradiators is disposed, such that they are aligned in the relative reciprocation direction and the head is disposed between two irradiators, and is configured to relatively reciprocate in the same direction as the relative reciprocation direction with respect to the mounting table, together with the head, and
• the irradiation controller is configured to perform control such that, in outward-way illumination intensity which is the illumination intensity of light to be radiated from the irradiators onto ink ejected from a certain nozzle of the head on the outward way of the reciprocating movement, and homeward-way illumination intensity which is the illumination intensity of light to be radiated from the irradiators onto ink ejected from the certain nozzle on the homeward way of the reciprocating movement, the illumination intensity for which a time from when the ink lands on the recording medium to when the ink is irradiated with light is longer is higher than the illumination intensity for which a time from when the ink lands on the recording medium to when the ink is irradiated with light is shorter, and the diameters of dots formed by the ink landed on the recording medium at both of the outward-way illumination intensity and the homeward-way illumination intensity fall within a predetermined range.