Museum Series Claybord from Ampersand is a unique, specially prepared working surface perfect for use with creative materials. It is made using high quality artist hardboard and features Ampersand's simply amazing kaolin clay ground formula similar which performs similar to the clay gesso grounds used during the Renaissance period. The surface is sanded to an ultra-smooth, highly absorbent finish so your colour or media remains true, brilliant and stable. Claybord is a favourite of both fine and graphic artists alike. Clayboard comes in three different depths of 3mm (1/8inch ), 22mm (7/8inch ) and 38mm (1.5inch ). Sizes available: 27.9 x 35.6 cm (11 x 14 inches) 30.5 x 40.6 cm (12 x 16 inches) 45.7 x 60.1 cm (18 x 24 inches)