Cernit is a natural clay mixed with plastic and is known as an oven ceramic. The clay is easy to work, right out of the package. When kneading the clay to its extreme softness, it does not stick to your hands or fingers. Over kneading, the clay make the Cernit clay becomes too soft to control and shaping of your creations can be difficult. If you are creating a very small miniature, you can also harden the clay by boiling it in water (I havenot tried this). The process of boiling to harden the clay cannot be done with other clays. You can harden Cernit clay at 130ºC / 265ºF.and can also use a hair dryer to repair your artwork. Use cold water with a filbert brush on Cernit to eliminate fingerprints or for separating Cernit from other materials and objects. Excellent for creating floating toys, as it is not porous in compare to other polymer clay, it is strong and does not break easily. Cernit is a profession polymer clay material that requires experience to handle the clay, finishing after baking in the over is superb.