Cernit Premium Modeling Clay - Cernit Polymer clay is known for its excellent color range, porcelain-like finish, translucent nature, and workablility. Cernit is ready to mold right out of the package, posseses high tensile strength, and remains soft for over a year, even out of the package! Once Cernit Polymer Clay has been oven-cured, it can be filed, carved, sanded or built-upon, pending it has not been painted or varnished. Baking instructions: place on an oven-safe tray and bake for 15-30 minutes at 265 degrees. Cernit Polymer Clay is non-toxic.