Cardboard; Labels of paper or cardboard; Packing (cushioning, stuffing) materials of paper or cardboard; Padding materials of paper or cardboard; Waterproofed cardboard (other than for use in building); Sewing patterns; Plastic film for wrapping; Plastic cling film, extensible, for palletization; Letter openers (knives); Paper cutters (office requisites); Scrapers (erasers) for offices; Stationery; Paper creasers (office requisites); Writing materials; Writing instruments; Self-adhesive tapes for stationery or household purposes; Gums (adhesives) for stationery or household purposes; Isinglass for stationery or household purposes; Square rulers for drawing; Pantographs (drawing instruments); Drawing boards; Etching needles; Engraving plates; Hectographs; Printers' blankets, not of textile; Drawing films; Apparatus for office use for opening envelopes; Machines for office use in the cutting of documents; Office staplers