Ultra Board (standard resolution)
Ultra Board is an indoor/outdoor product and an industry standard. It comes in 3/16" thick and 1/2" thick. It also is available with Black foam and Black back. It is an extruded polystyrene foam board bonded between two layers of .015 Styrene.
Designed primarily for interior use and is favored for its durability. The smooth dent-resistant, water-proof liners are secured to the foam center with a bond that keeps the panel flat and rigid. The surface does not allow moisture to penetrate, so inks stand out vividly.