Fredrix Pro Series Linen Canvas Boards are constructed throughout with the highest quality, non-acidic archival materials. The tempered hardboard core will not warp, become brittle or rot over time. Mounted with acid-free adhesive, the painting surface uses the finest 100% Belgian linen. Choose between Acrylic or OiI surface priming. These canvas boards are ideal for painting with oils or acrylics. The Fredrix Archival Seal of Quality assures this product will stand the test of time.