Hartman's Heat Activated is available in 3/16" and 1/8" thick. HartAct™ is designed for use with heated mounting presses and heated rollers. The coated side is dry and tack-free, for easy, permanent mounting. The boards are packaged 25/35 sheets per carton. Each carton of HartAct™ includes interleaving sheets, eliminating the need for dry mount tissue and extra labor. Mount prints, posters, artwork and photographs (except resin coated photos).