公开(公告)号：US11034179B2

公开(公告)日：2021-06-15

申请号：US16485298

申请日：2018-02-15

Applicant: KAO CORPORATION

Inventor： Ryuma Mizushima ,  Yuta Matsumoto ,  Yasufumi Ueda

IPC: B41J11/00 ,  B41M5/50 ,  C09D11/033 ,  C09D11/30 ,  B41M5/00 ,  B41M1/30 ,  B41F19/00 ,  B41F23/04

Abstract: The present invention relates to [1] a process for producing a printed material, including step 1 of subjecting an image-bearing surface of a printed recording medium 1′ on which characters or images are formed by analog printing to discharge treatment under specific conditions to obtain a printed recording medium 1, and step 2 of further forming characters or images on the image-bearing surface of the printed recording medium 1 by ink-jet printing using a water-based ink to obtain the printed material, [2] an ink-jet printing method including the step of ejecting a water-based ink onto a printed recording medium 1 by an ink-jetting method to form characters or images thereon, in which the printed recording medium 1 has an image-bearing surface on which characters or images are formed by analog printing, and the image-bearing surface is subjected to discharge treatment under the specific conditions, [3] a recording medium for ink-jet printing, including an image-bearing surface on which characters or images are formed by analog printing and which is subjected to discharge treatment, in which a surface free energy of the image-bearing surface after being subjected to the discharge treatment is not less than 30 mN/m, and [4] a printed material including an image-bearing surface on which characters or images are formed by analog printing and then on at least a part of which characters or images are further formed by ink-jet printing using a water-based ink, in which the image-bearing surface after forming the characters or images thereon by the analog printing is subjected to discharge treatment, and a surface free energy of the image-bearing surface after being subjected to the discharge treatment is not less than 30 mN/m.