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The colors are pastel at Cone 06, and deepen and intensify as firing temperatures increase. Their best color is achieved between Cone 6 to 8. Polar Porcelain is a smooth lower range porcelain good for throwing and hand-building. Popular for making jewelry.
Self-hardening clay, also known as air-dried, air-hardening or non-firing clay, is perfect for beginners or anyone without a kiln. It can be used for handbuilding, throwing and sculpting. May be finished with paint, stain, or with gloss fixatives. It will harden in days. Not food safe or good for containing liquids.