Ampersand Pastelbord is made of a gesso and clay coated hardboard panel with a granular marble dust finish.The result is a textured board comparable to sanded pastel paper, but much more durable and versatile.Since it has a hardboard backing, Pastelbord can be used with wet or dry pastel techniques, as well as acrylics.The museum quality surface is non-yellowing and ph neutral.Available in multiple colours and sizes.This assorted pack comes with four 0.3cm thick, 13cm x 18cm panels, one of each colour- white, sand, grey, and green.