Premo Sculpey should be cured at 275º F (130 C) in a preheated oven for 30 minutes per quarter inch of thickness. DO NOT MICROWAVE. Once cured, the colors intensify and deepen.
Hint: Conditioning of all polymer clays may be facilitated with the use of a pasta machine. Simply cut the block in half and feed each half through the largest setting. Repeat 10 times more and your clay should be conditioned.