16 Paper and paper products; cardboard and cardboard products; booklets, flyers, pamphlets, calendars, cards, forms, greeting cards, invitations, labels, letters, newsletters, note books, stationery pads, blotters, memorandum and engagement books, diaries, letter racks, files, index files, postcards, posters, tickets, writing pads, writing paper; printed matter; newspapers, periodicals, books, bookbinding materials; printed publications; journals, magazines, catalogues; stationery and office requisites; pens, pencils, felt pens, propelling pencils, ballpoint pens, paperweights