Kao Corporation

Tsutomu Isobe

Yuzo Yamamoto

Yoshiyuki Eshita

Katsunori Nomoto

Kazuhiko Kato

Masanobu Wakasa

Takeshi Satoh

Kuniyuki Nakanishi

Gen Nakauchi

Kenji Manago

Noriyuki Tanji

Provided is an oral composition which is excellent in a gloss imparting effect on teeth. An oral composition, which comprises the following components (A) and (B):

Oral composition

The invention provides a composition capable of exerting an excellent whitening effect and imparting gloss to teeth. A method for removing a solid product formed on surfaces of teeth, the method containing applying an oral composition to teeth, wherein the oral composition contains 0.05 to 18% by weight of phytic acid or a salt thereof, and contains no polyvalent cation or contains a polyvalent cation in an amount of less than 0.1 fold mol relative to phytic acid, and wherein the oral composition, as diluted with water to 30% by weight, has a pH of 5.5 to 6.5.

Method for removing solid product formed on surfaces of teeth

A magnetic recording medium is disclosed, which contains a substrate, an uneven layer and a metallic magnetic layer provided on the substrate in that order, wherein the uneven layer is made of an Al--M (wherein M is a metal capable of forming a carbide) and has an uneven surface. This magnetic recording medium enables a magnetic head to float at a low height, and prevents the magnetic head from sticking to the magnetic recording medium. Further, the uneven layer has an excellent adhesivity to the substrate preventing it from peeling off the substrate, and thus a magnetic recording medium having an appropriate surface roughness and excellent durability is provided. This magnetic recording medium can cope with high density recordings.

Magnetic recording medium having a metallic magnetic layer and an

The magnetic recording medium comprises a substrate, a recording coating of a ferromagnetic metal and an aromatic organic polymer having a weight-average molecular weight of 1,000 to 5,000,000. The magnetic recording medium is produced by a plating method or a vaporization method so as to form co-deposition of the metal and the polymer. The magnetic recording medium produced is improved in resistance to corrosion.

Process of making a magnetic recording medium

Magnetic recording medium

Growing community of inventors

Tochigi, Japan

Tsutomu Isobe