This board is designed for mounting and matting fine archival works of art. The specially treated, acid-free 100% cotton fibers and buffering agent provide enduring protection from the destructive effects of acid. All boards have solid consistent surface and internal color that eliminates off-color bevel mats and affords two usable surfaces. Colors are rated at 80 hours test fade. Can be used for large format sheet printing as ‘Strathmore’.