Cernit Translucent Ruby Red Polymer Clay 56g Polymer clay for baking. Cernit Translucent polymer clay gives a gemstone look. It is the most translucent of the polymer clays. It is ideal for making jewelry. You can use your hands, the laminator or the rolling pin. Once your piece has been created, preheat the oven to 130º, once hot, insert the project and bake it for 30 minutes at the same temperature. Once cool you can sand it, polish it... Resistant and flexible. Brand: Cernit