著者
川北 宇夫
出版者
公益社団法人 応用物理学会
雑誌
応用物理 (ISSN:03698009)
巻号頁・発行日
vol.28, no.4, pp.223-228, 1959-04-10 (Released:2009-02-09)
参考文献数
10

Our daily task of shaving is discussed in this article. Shaving touch, which is quite a vague notion and involves many factors, is very difficult to treat quantitatively. The writer, who reported informer articles a new method to measure bevel angle of razor blades, investigates the relationship between the actual shaving touch and the physical quantities such as top edge radius, top edge angle, paper-or string-cutting value and so on. The factors which dominate shaving touch are classified into three groups: physical factors, physiological factors and pre-shaving treatments. “Pulling” effect in shaving is desired to be possibly small, which means that the top edge radius of blade should be small. “Planning” effect is also very important in actual shaving. If the top edge angle is large, the “planning” is diminished and the shaving touch to the skin is mild. But if the top edge angle is too large, the touch to the skin is slack and we can not get satisfaction in such a shave. “Stropping”effect of shaving was found by the writer in this investigation: the edge which had been deteriorated artificially by repeated paper cutting tests was found sharpened after actual shaving. The rough-hone angle is not an important factor in shaving touch. Concerning the holder of blade, the shaving angle is of much importance. Sound effect, resistant feeling to the hand, sensation of pain by “pulling” and distribution of string cutting value are also discussed in this article.

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なぜジレットなのか、両刃交換式の安全剃刀を発明したKing Camp Gillette(1855年1月5日~1932年7月9日)の話、最近知った琵琶湖の湖畔で安全剃刀の研究を続けた晩年の川北栄夫と三男宇夫氏(「墜落事故のあと」の著者)の論文https://t.co/04LaCALjqrなど話題は尽きないが、繰り返しなので止めておく。
@tatsuromania この論文https://t.co/04LaCALjqrの執筆者の住友電工の川北宇夫氏(墜落事故のあとの著者でもある)と川北栄夫が主催していた日本家庭資料研究所https://t.co/TzuCWiPzfcとは論文の内容から言って不可分な関係だった事は明解ですが、お二人が親子だと記したものがないので曖昧な記述になっています。

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