16 Paper; paper articles, namely, paper art pads, artists' sketch pads, artists' paper blocks for sketching, drawing and painting; note paper pads; blocks of blank paper, paper drawing boards and paper painting boards; cardboard for packaging; cardboard articles for artists' use, namely, painting boards, cardboard picture mounts; artists' canvas panels and canvas boards; drawing boards; crayons; pastels; erasers; pencil sharpeners; writing and drawing materials and implements, namely, artists' writing and drawing quills, calligraphy brushes and calligraphy pens; pencils; pens; artists' charcoal sticks for drawing and sketching; markers; chalks; paint brushes; artists' brushes; artists' painting palettes; artists' saucers in the nature of paint palettes; artists' easels; paint boxes; printed matter, namely, printed forms, catalogues, guides, and manuals in the field of art, artists' materials, artistic techniques and art education;