Bainbridge 3/16" Black Acid-Free Foam Core is the finest available. Unlike other foam core boards sold elsewhere, ours are 100% cotton and acid-free, never yellowing, becoming brittle or harming your work. Foamboard makes a perfect addition to our archival mats, protecting your valuable work for generations to come. This is the only acid-free black foamboard on the market.

For dramatic displays, as a backing board for pieces matted with black mats, an archival dark poster board or even used as a drawing surface, our Black Foam Core shines. Super lightweight, yet very sturdy, this will make a striking presentation. Since it is acid-free and archival, our Foam Core will never yellow, become brittle or damage your valuable work.