Kao Corporation

Masato Hoshi

Koji Endo

Yasushi Shioya

Hidenori Yorozu

Takehiro Tsutsumi

Koji Azuma

Isao Tsuru

Nobushige Tanaka

Yuji Ichii

Ryozo Nakai

Kiyoshi Matsumoto

Masayuki Hashimoto

There are provided a water dispersion for ink-jet printing which contains a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; a water-based ink containing the water dispersion; a print obtainable by printing images or characters with the water-based ink; and a process for producing the water dispersion. Also, there are provided an ink set for ink-jet printing containing two or more kinds of inks having different colors from each other wherein the inks each contain a water dispersion of particles of a vinyl polymer or a polyester-based polymer which contain a colorant (B), and a water-insoluble organic compound (A) except for aliphatic acid derivatives; and a process for producing a print using the ink set. The water-based ink can provide multi-order color images or composite black images which exhibits a high optical density and is excellent in gloss and image clarity.

Water-based inks for ink-jet printing

An apparatus for evaluating water permeability of the stratum corneum epidermidis, including a feeding device for feeding a carrier gas to a skin surface to be measured, a measuring device for measuring humidity of the carrier gas discharged from the feeding device over the skin surface, and a calculating device for calculating a water transpiration amount and an overall mass transfer coefficient of water in the stratum corneum epidermidis based on properties of the carrier gas and the humidity.

Method for evaluating skin health

Apparatus for measuring transpiration amount

Surface-treated sodium bicarbonate particles, the surfaces of which are coated with sodium carbonate or its double salt, are disclosed. Heat treatment or irradiation with micro waves o infrared light converts the surfaces of sodium bicarbonate particles into sodium carbonate. The surface-treated sodium bicarbonate particles exhibit an increased capacity to bind with other sodium bicarbonate particles as well as with other components when they are molded. They can be used as an excellent binder for molding various preparations. The products produced have a prolonged storage stability.

Surface-treated sodium bicarbonate particle and molded preparation

Growing community of inventors

Wakayama, Japan

Masato Hoshi