… calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 % of H3BO3 calculated …
Explanatory notes
… calcined), but not including borates separated from natural brine; natural boric acid containing not more than 85 % of H 3 BO 3 … extracted, concentrates (whether or not calcined) of such materials, and natural boric acid as obtained by evaporation …