16 Paper; cardboard; printing products in the nature of printed matter, namely, printed books, magazines, newsletters, research papers, journals, and periodicals in the field of academic research; bookbinding materials for creating hardcover books, namely, book covers, crack-and-peel binding paper, reinforcement strips, peel-and-stick labels, stapler and staples; printed photographs; writing cases, namely, stationery cases; gums, namely, adhesives for stationery or household purposes; artists' materials, namely, artists' pens, artists' pencils, and artists' brushes; brush markers; typewriters and office requisites except furniture, namely, paper trimmers, staple removers, and staplers; instructional material except apparatus, namely, printed instructional and teaching materials in the fields of history, archaeology, history of the arts, language and literature; plastic materials for packaging, namely, plastic films for packaging, plastic bags for packaging, and plastic envelopes for packaging; printing type; printing blocks