Ampersand Museum Series Pastelbord is a clay and gesso coated hardboard panel with a granular marble dust finish comparable to a sanded pastel paper, except more durable and more versatile. It can be used with wet or dry traditional pastel techniques or with acrylics, oils, watercolors, gouache, and charcoal. The coating is pH neutral and non-yellowing, making it a truly permanent museum quality surface.