This illustration board makes the perfect art supply for art students, budding illustrators, architects and more. This thick, durable paper is suitable for a variety of artistic mediums including watercolor and acrylic. This ruling mechanical board helps to produce crisp line work. Ink lines can be erased without affecting the board. Erase it, scrape it, re-ink it. Perfect line quality every time makes it great for all-around linework. Smooth white surface.