Museum Series Gessobord is a trusted, professional-quality, prepared wood panel for artists. The superior quality acrylic gesso ground does not dull colors and the wonderful lightly sanded surface provides exceptional brush control with both oils and acrylics. Made with 1/8" hardboard and Archiva-Seal technology, the surface is acid-free, non-yellowing and archival. It's perfect for traditional and water-based oils, alkyds, acrylics, collage and mixed media. Details:Titanium white1/8" flat panel1 panel (3 panels of 5" x 7")Available in assorted sizesAcid free, non-yellowing and archival