Explanatory notes
… water (sometimes acidulated) from the vegetable material (wood, barks, leaves, fruits, roots, etc.) previously ground … 32.02 ). (c) Residual lyes from the manufacture of wood pulp, whether or not concentrated ( heading 38.04 ). … include oak bark tannin (quercitannic acid), chestnut wood tannin (castaneotannic acid), quebracho tannin, mimosa …