Shape it in your hands or with simple clay tools, dry completely and use with any of the PMC+ or PMC3 materials. If you are pasting over the cork, pre-sand the cork with emery boards to perfect its shape. Also, reducing the firing temperature to 1475 degrees F for 30 minutes will help keep the shape of the bead without risking blow-outs or cracking. Make sure the cork is completely dry before firing, especially in humid climates. Now available in two sizes regular and large.