Made from a mixture of paper pulp and thermal set epoxy resin, it may be painted upon with oil or acrylic color without pre-priming, and when pre-dampened is a highly dependable surface for the watercolorist. MultiMedia Artboard features a flat and textured side. It will not yellow, is acid-free, neutral pH balanced and won't deteriorate since it will not absorb water! MultiMedia Artboard will bring out the brilliant colors in your designs, holds a definite edge and will never bleed. A highly practical and durable product! Not Assortable.