It refers to a tree of the legume family, mainly Acacia mollissima Willd. (English name: black wattle), or the tannin extracted from it. When the bark is boiled in hot water and the water is removed, an extract remains. The yield is 30-40%. The tannin content of the extract can reach 70-80%. The Republic of South Africa accounts for almost all of the world's wattle production. Wattle is not only used to tan animal hides, but is also chemically modified and used as an adhesive and reservoir purifier. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
マメ科の主としてモリシマアカシアAcacia mollissima Willd.(英名black wattle)の樹木,またはそれからとったタンニンをいう。樹皮を熱水で煮だし,水分を除くと,エキスが残る。収率は30~40%。エキスのタンニン含量は70~80%にも及ぶ。南アフリカ共和国が世界のワトル生産のほとんどすべてを賄う。ワトルは動物の皮をなめすのに使われるだけでなく,化学的に変性して,接着剤,貯水池の浄化剤などにも使われる。
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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