Sculpey III Is the softest brand of Polymer clay, it comes in a great range of colours and be mixed with Fimo, Cernit, Premo. When baked it has more if a matte finish but can be polished to a high shine if required. A little more brittle than the other brands so good for delicate or fine work.
For Sculpey III, preheat to 135 C degrees F (275 F). Bake for 15 minutes per quarter inch of thickness. For example, a piece of 1,5 cm (1/2″) thickness should be cured for 30 minutes. To test the curing, try pressing the tip of your fingernail into the bottom of your piece after it has cooled; it will leave a mark but will not actually enter the clay