Albums for stickers; Art etchings; Back-up boards, back-up sheets, back-up panels, entry boards, entry sheets, and entry panels made out of paper for use in the operation of drilling holes in printed circuit boards; Binder clips; Binding materials for books and papers; Blank lesson plan books; Boxes, containers, and cartons of paperboard or cardboard for commercial or industrial packaging; Cardboard backing for binding books; Cardboard packaging boxes in collapsible form; Cardboard signboards