Crescent - Chipboard - Single Thick - .040 - 32x40 - Crescent Chipboard is great for mounting, backing, book making, and craft constructing. Both sides have a smooth un-coated surface. Chipboard comes in slightly varied shades of gray depending on recycled materials used. Crescent Chipboard comes in Single, Double, and Triple Thickness. Single Thickness Chipboard is approximately 14ply.