Heavy-duty, 14-ply art poster board with a laminated middle for extra strength and rigidity. It is clay-coated on one side with gray imprinted backing. The quality clay coated surface is bleed- and fade-resistant and accepts all sign painting media and vinyl lettering. Intended for use with tempera or acrylic paints, pen and ink, markers, air brush, silk screen and other printing mediums. Sheets measure 28″ x 44″.