Ampersand - Hardbord - Flat Panel - 16x20 - Use Ampersand's Hardbord if you want to prepare your own panel. Start with unprimed Hardbord and apply your own oil or acrylic primers. Hardbord is the finest pressed wood panel available anywhere. Made in the U.S. from quality hardwoods, this panel resists warping and moisture penetration. Hardbord accepts all types of commercial and handmade gesso grounds. Complete priming instructions inside product labeling. Hardbord is also an excellent surface onto which paper can be mounted.