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1. (WO2018135081) PIGMENT COMPOSITION

Pub. No.:    WO/2018/135081    International Application No.:    PCT/JP2017/039420
Publication Date: Fri Jul 27 01:59:59 CEST 2018 International Filing Date: Wed Nov 01 00:59:59 CET 2017
IPC: C09D 17/00
Applicants: SCREEN HOLDINGS CO., LTD.
株式会社SCREENホールディングス
Inventors: MORIKAWA Soichiro
森川 聡一郎
FUJIMORI Yoshihisa
藤森 義久
Title: PIGMENT COMPOSITION
Abstract:
Provided is an edible pigment composition that has a small average dispersed pigment particle diameter and an excellent dispersibility and that, through application to an inkjet-capable water-based ink composition, enables direct printing by an inkjet method on, for example, tablets of, e.g., pharmaceutical products and food products. The pigment composition according to the present invention contains a pigment, a pigment dispersing agent, and a dispersion medium and is characterized in that the pigment contains triiron tetroxide, the pigment dispersing agent contains sodium alginate, and the average dispersed particle diameter of the triiron tetroxide is in the range of 30-300 nm.