![Foam Board 3/16 inch Thickness - Acid Free 32x40 inch Off White - merriartist.com](http://merriartist.com/cdn/shop/products/foam-board-316-inch-thickness-acid-free-32x40-inch-off-white-437581_300x.jpg?v=1671489276)
Elmer's
Foam Board 3/16 inch Thickness - Acid Free 32x40 inch Off White
Unlike regular foam board whose surface has a pH rating of 6.5, this sheet has a pH rating in the 7.3 to 8.5 range. Each board has been buffered with an alkaline substance to maintain the pH level for years. Available in white and antique white.