...The name comes from the fact that the pH value of the suspension is acidic (pH 5 to 6). It is thought to be produced by the weathering of bentonite on the surface, and Kambara white clay from Kambara County, Niigata Prefecture has long been famous. It can also be produced by treating bentonite with sulfuric acid. *Some of the terminology that refers to "Kambara Shiraku" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…その名称は懸濁液のpHの値が酸性(pH5~6)を呈することによる。ベントナイトの地表風化によって生成したものとされ,新潟県蒲原郡産の蒲原白土は古くより著名である。ベントナイトの硫酸処理などにより製造される場合もある。… ※「蒲原白土」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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