This heading covers kaolin and other kaolinic clays, the main constituents of which are kaolin minerals such as kaolinite, dickite and nacrite, anauxite, and halloysite. Such clays remain in the heading even when calcined.
Kaolin, also known as China clay, is a high grade, white or nearly white clay used in the porcelain and paper‑making industries. Kaolin‑bearing sands are excluded (heading 25.05).
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