Model your creativity with this set of Primary colours. DAS Smart clay is easy to manipulate with a compact and versatile structure. DAS Smart is the new PVC-based oven-hardening clay that does not stain your hands. It is ideal for making murrine, creating jewels and small artefacts. Bake in a 130° oven for up to 30 minutes, but objects can be cooked several times to add new details.