Create Your Own Drop Ring Molds! Simply trace your own pattern onto the fiberboard. Cuts easily with a fiberboard saw (as shown in photo). The fiberboard's pressed ceramic fibers are perfect for creating unique drop molds or walls to cast frit. For single time use, fiberboard can be used as is. For multiple firings, treat first with mold hardener, prefire to cure, and coat with kiln wash. DuraBoard measures 12" square by 1/2" thick. Sold individually. Fish bowl shown by artist Brenda Ellens created in the Kiln Cast Bowls Class at the Lansing Creativity Center. Second project by artist Val Oswalt-De Waard.