Dainichiseika Color & Chemicals Mfg. Co., Ltd.

Tohru Hosoda

Michiei Nakamura

Kenji Ogawa

Dai Watanabe

Hisao Okamoto

Yoshiyuki Zama

Naoyuki Sakai

Akio Yoshida

Atsushi Nogami

Hiroyuki Shimanaka

Shigeru Sakamoto

Yoshio Abe

Hiromitsu Yanagimoto

Kazuo Kanou

Masanori Takakamo

Yoshimasa Tsuchiya

Hideyuki Koiso

An aqueous pigment dispersion is produced by ultrafinely dispersing a pigment dispersion mixture, which has been obtained by mixing at least a pigment and a dispersant in an aqueous medium, with microbeads having diameters of not smaller than 0.02 mm but smaller than 0.2 mm. A color composition for a color filter is produced by dispersing a mixture of a pigment, a dispersant, a resin varnish and a solvent with the microbeads in a mill.

Water-based pigment dispersions, inkjet recording inks, and color filters

A water-based pigment ink contains a pigment, a hydrophilic dispersant, an aqueous medium, an alkali agent for solubilizing the hydrophilic dispersant in the aqueous medium, and a hydrophilic compound having at least one structural unit of 'hydrophobic molecular chain-hydrophilic molecular chain-hydrophobic molecular chain' in a structure thereof. The water-based pigment ink is suited especially as an ink for ink-jet printers.

Water-based pigment inks, image recording method, and image recording system

A near-infrared reflecting composite pigment comprises a near-infrared non-absorbing colorant and a white pigment coated with the near-infrared non-absorbing pigment. The near-infrared reflecting composite pigment can be produced by mixing a colorant dispersion, in which the near-infrared non-absorbing colorant is dispersed in a liquid medium, with the white pigment in a form selected from powder or a dispersion and then drying the resultant mixture. A near-infrared reflecting coating agent comprises as a coloring agent the near-infrared reflecting composite pigment. A near-infrared reflecting material comprises a base material coated on a surface thereof with the near-infrared reflecting coating agent.

Near-infrared reflecting composite pigments

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Tokyo, Japan

Tohru Hosoda