HTS Code 4810.19 - Paper and paperboard used for writing, printing or other graphic purposes, not containing fibres obtained by a mechanical or chemi-mechanical process or of which = 10% by weight of the total fibre content consists of such fibres, coated on one or both sides with kaolin or other inorganic substances, in square or rectangular sheets with one side 435 mm or with one side = 435 mm and the other side 297 mm in the unfolded state