French green clay 应该也叫 ventilated bentonite吧， 难道是产在法国的火山灰？在一个网站上看到有卖bentonite,产于美国，颜色是灰灰的。想想可能是缺少某种矿物成分，所以不是绿色的。不知作用有何差别，能否代替？
http://www.wholesalesuppliesplus.com/ProductDetail.aspx?CatalogID=1&GroupID=505&CategoryID=1399&ProductID=2704&ProductName=Crafters+Choice%e2%84%a2+Bentonite+Clay+NF
http://www.wholesalesuppliesplus.com/ProductDetail.aspx?CatalogID=1&GroupID=505&CategoryID=1399&ProductID=2704&ProductName=Crafters+Choice%e2%84%a2+Bentonite+Clay+NF
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