Museum SeriesGessobord� by Ampersand is a superior quality preprepared board for painting onto in Acrylic, Oil or in using Mixed Media. The finest quality acrylic gesso is used meaning the ground does not dull colours and the wonderful lightly sanded surface provides exceptional brush control. Made with Ampersand's 1/8inch True Artist Hardboard� and Archiva-Seal� technology, the surface is acid-free, non-yellowing, and archival and perfect for all painting styles and approaches. Only Ampersand builds their cradles by hand with premium grade 13-ply birch plywood for maximum stability and a clean, finished look from edge to edge. These prepared painting surfaces from Ampersand are available in a wide range of sizes, ranging from; 12.7 x 17.8cm (5 x 7inch;) through to 45.7 x 60.1cm (18 x 24inch;) and in three different depths of 3mm (1/8inch ), 2.2cm (7/8inch ) and 3.8cm (1.5inch )