Definition from Wiktionary, the free dictionary
art paper (plural art papers)
- Any type of paper that has a specific use in art.
- 2004, Harald Johnson, Mastering Digital Printing 
- The surface of uncoated fine art paper is sometimes sized with starches or gelatins.
- 1983, Barbara Pronin, Substitute Teaching: A Handbook for Hassle-Free Subbing 
- They can paste the result onto art paper of a contrasting color for a truly beautiful effect.
- 2003, Holly Harrison, Paula Grasdal, Collage for the Soul: Expressing Hopes and Dreams Through Art 
- To make window frames, apply gold 33 acrylic paints leaf to craft or art paper, let dry, then cut out frames with a craft knife.
- 2004, Harald Johnson, Mastering Digital Printing