公开(公告)号：US11142661B2

公开(公告)日：2021-10-12

申请号：US16626215

申请日：2018-06-15

Applicant: KAO CORPORATION

Inventor： Tomoaki Il ,  Isao Tsuru ,  Norihiro Yoshida ,  Yoshiharu Niizeki ,  Jun Tairadate ,  Kimiya Yamada ,  Hideki Sakai

IPC: C09D11/322 ,  B41J11/00 ,  C09D11/326 ,  C09D11/40

Abstract: The present invention relates to an ink-jet printing method using an apparatus including a printing means for ejecting a black ink to a printing substrate to print characters or images on the printing substrate, and a drying means disposed on a downstream side of a transportation direction of the printing substrate, in which the printing substrate is a label printing substrate; the black ink is a water-based composite black ink; the water-based composite black ink contains a composite black pigment containing carbon black, and a content of the carbon black in the composite black pigment is not more than 25% by mass; and the drying means is an infrared heater for heating the water-based composite black ink ejected onto the printing substrate to a temperature of not lower than 95° C. and not higher than 125° C. According to the ink-jet printing method of the present invention, it is possible to obtain a good printed material that is free of color migration or deformation of a printing substrate even when printed on a label printing substrate.