Kao Corporation

Yoshihiro Minematsu

Shuichi Akazaki

Naotake Takaishi

Akira Kawamata

Genji Imokawa

Takashi Komori

Shinji Yano

Tsuyoshi Ohtomo

Mitsuko Zama

Yasuhiro Honma

Michio Kawai

Hisashi Misumi

Nobuo Miyazaki

Toshiyasu Suda

An external skin care preparation comprising a compound represented by the following general formula (I) or (II), or a salt thereof: ##STR1## wherein R.sup.1 means an aliphatic hydrocarbon group having 9-25 carbon atoms, A and B denote specific groups respectively, R.sup.6 and R.sup.7 are individually an aliphatic hydrocarbon group having 10-26 carbon atoms, and R.sup.8 denotes a group --CH.sub.2 CH.sub.2 OH, --CH.sub.2 COOH, or --COCH.sub.3.

External skin care preparation

An external skin care preparation comprising a compound represented by the following general formula (I) or (II), or a salt thereof: ##STR1## wherein R.sup.1 means an aliphatic hydrocarbon group having 9-25 carbon atoms, A and B denote specific groups respectively, R.sup.6 and R.sup.7 are individually an aliphatic hydrocarbon group having 10-26 carbon atoms, and R.sup.8 denotes a group --CH.sub.2 CH.sub.2 OH, --CH.sub.2 COOH or --COCH.sub.3.

This invention relates to the measurement of the moisture content retained in the skin, and enables accurate diagnosis of the skin conditions by a device which can be switched in the connection of measurement electrodes to measure the moisture content either in the surface or in the depth of the keratinous layer of the skin.

Measurement method for moisture content in the skin and system therefor

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Funabashi, Japan

Yoshihiro Minematsu