Description Acid-free construction for longevity Great for studio, art class and home painting use Sized perfectly to create portraits, sketches, still-lifes and more Heavy-weight construction makes this paper ideal for use with watercolors but can be used with a variety of other mediums The Sax Watercolor Paper Pad is designed to hold up to repeating washings for watercolor and is also perfect for dry medium. Recyclable. Acid free.