Alvin mat board and presentation board. Perfect for your architectural projects, scrapbooking, photo matting, paper crafts, office and school displays, and more. Quality, versatile Alvin mat boards are perfect for drawings and renderings as well as mounting photos, artwork, and presentations. Rigid, neutral pH materials cut cleanly and are durable enough to be used for art projects, signs, 3-D models, and displays. Photo mat board is available in a variety colors, in both smooth surface and textured. 16 ply (.054") thick. ACID-FREE.