0 0 0 0 0 0 0 0 0 4810.31 Kraft paper and paperboard, bleached uniformly throughout the mass and containing > 95 % chemically processed wood fibres by weight in relation to the total fibre content, coated on one or both sides with kaolin or other inorganic substances, in rolls of ain square or rectangular sheets, of any size, weighing <= 150 g/ma (excl. that for writing, printing or other graphic purposes)