Cernit Number One Polymer Clay Black 500g Polymer clay for baking. The Cernit “Number One” range modeling clay is very flexible and easy to model.  It maintains its shape during the working process and is perfectly suited for filigree and detailed work. Bake the dough between 110°C and 130°C in a conventional oven for 30 minutes maximum. Matte finish. No smell when cooking. Does not crack. Color: black. Quantity: 500 gr. Brand: Cernit