Inkjet printer and inkjet printing method

摘要

Disclosed is a printing method whereby a glossy image free of running can be printed by an inkjet printer. An inkjet head (14) is caused to scan in the Y direction to print outline portions (32 and 33) on a medium (31). Next, immediately after the printing of the outline portions, a first UV irradiation means (15 or 16) disposed coaxially with the scanning axis of the inkjet head irradiates ink at the outline portions with UV light to harden the ink at the outline portions to prevent running. Next, the inkjet head prints a solid portion (34) between the outline portion (32) and the outline portion (33), and a second UV irradiation means (17) disposed forward in the scanning direction (X direction) of the medium (31) hardens the ink at the solid portion.

主权项

1. An inkjet printing method by which an image formed of an array of ink droplets is printed on a surface of a printing medium by an inkjet head that scans relative to the printing medium and includes a plurality of discharge ports to discharge ink in the form of droplets, based on an image data that includes an image area portion divided into a plurality of image areas and a outline portion that divides the image area portion, the ink being an energy light curable ink, the inkjet printing method sequentially comprising:
a border printing step of printing the outline portion; a border curing step of curing the printed outline portion by irradiating an energy light; an image area printing step of printing the image area portion adjacent to the outline portion that is cured at the border curing step; and an image area curing step of curing the printed image area portion by the energy light, wherein each of ink droplets in an array forming the outline portion is smaller than each of ink droplets in an array forming the image area portion, and the outline portion is set for portions having a gradation difference in adjacent image areas, the gradation difference is obtained by subjecting a plurality pixel data to differentiation, detecting a plurality of change points, and connecting the change points with a data string.