Claybord is a museum quality panel coated with a smooth absorbent clay ground comparable to the clay gesso grounds used during the Renaissance. Archival, lightfast, and acid free, the panels are ideal for acrylics, gouache, tempera, egg tempera, pen and inks as well as for mixed media techniques, airbrush, and collage. The surface is additive and subtractive. Remove paints to add contrast, texture, tonal value and fine details. Perfect for any artwork that requires an extremely smooth surface.