Plus Clay is a premium, natural, self-hardening clay. Its exceptional plasticity and ultra fine grade allows for excellent detail and versatility. It air cures with minimal shrinkage, superior strength and durability and will not crumble.Plus Clay Can be carved, sanded, drilled when dry and accepts virtually any finish. Plus clay is primarily composed of all natural clay so if you choose to do so, it can also be kiln fired between Seger cone 6 and cone 4. It is moist, odorless, and ready to use right out of the package. Suitable for all hand building methods, throwing on a potter's wheel, and sculpting. Ideal for artists, hobbyists, educators, professionals, and novice ceramic users.