Self-hardening clay

Low-fire clay is available in a variety of colors and can be used successfully for making small decorative items. It will harden when baked in a regular kitchen oven at a low temperature, but it cannot be glazed. Various brands of self-hardening clay are available. It will harden in air, drying with a permanent finish, and it is available in a variety of colors suitable for small decorative objects such as beads and jewelry. 

Coldclay. A self-hardening clay, tradename of Fulham Pottery. Cf. DUOCLAY. 

Ceramic a nonmetallic material made from clay and hardened by firing at high temperature it contains minute silicate crystals suspended in a glassy cement. (16.5) Chain reaction (nuclear) a self-sustaining fission process caused by the production of neutrons that proceed to split other nuclei. (20.6)... 

---