Toyo Ink Mfg. Co., Ltd.

Shoko Goto

Kenji Kitamura

Shigeki Kato

Hitoshi Maki

Osamu Shiromaru

Masayuki Fujiki

Shuuichi Kimura

Hiroyuki Yanai

Motoi Shitaka

A thiazineindigo pigment dispersant represented by Formula (1) or (2): where E denotes a basic group. A pigment composition contains a pigment material, and the thiazine indigo pigment dispersant. A colored composition contains the pigment composition and a pigment carrier. A color filter includes a filter segment prepared from the colored composition.

Thiazineindigo pigment dispersant, and pigment composition, colored composition and color filter, using the same

A monoazo lake pigment composition containing a monoazo lake pigment obtained from a laked pigment aqueous slurry prepared by conducting coupling of a diazo component obtained by diazotizing an aromatic amine having a soluble group and a coupler component and conducting laking after or simultaneously with the coupling, wherein the laking is carried out in the presence of a water-soluble acrylic polymer in an amount of 0.1 to 40 parts by weight per 100 parts of the above coupler component, and a gravure ink containing the above pigment composition and a gravure ink vehicle.

Monoazo lake pigment composition and gravure ink using the same

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Tokyo, Japan

Shoko Goto