Rigid Board provides a great paper alternative to Foam Board. It is PVC free, and 100% recycled with 10% post-consumer waste. This 180 lb. board has a multi-ply, corrugated construction of 3mm (1/8") thick.. It's ideal for high performance digital screen printing and flatbed printing. It can also be used as a heavy-duty poster board for signage and displays. It is moisture-resistant and archival quality. White surface is measured at a brightness of 98. Acid-free and recyclable. Measures 20" x 28". Sold as a carton of 10 sheets.