Uncoated paper and paperboard, of a kind used for writing, printing or other graphic purposes, and non perforated punch-cards and punch tape paper, in rolls or rectangular (including square) sheets, of any size, other than paper of heading 4801 or 4803; hand-made paper and paperboard › Other paper and paperboard, of which more than 10 percent by weight of the total fiber content consists of fibers obtained by a mechanical or chemi-mechanical process