The Art Clay series of products are made of pure metal powders mixed with non-toxic binders and water. When kiln, torch or stove top fired, the binders burn away, leaving pure silver (99.9% silver), pure copper (more than 99.5% copper), and gold (22K).
The Art Clay Range is easy to handle, and you can freely shape it just like with the modeling clay you used when you were a child. After firing at the proper temperature and holding time you will get a one-of-a-kind pure silver, gold, or copper piece .

Clay Form Clay contains fine silver powder, water, and binder. Can be formed while still soft.		Drying Moisture in the clay dries out, and the clay gets harder.		First stage of Firing Binder burns away, and fine silver powder starts the sintering process.		Completely fired Silver particles solidify completely, and become more than 99.9% pure silver.
Forming		Trimming Drying		Firing		Finishing

The AP (Approved Product) Seal, with or without Performance Certification, identifies art materials that are certified safe for use in an extensive toxicological evaluation by medical experts to contain no materials in sufficient quantities to be toxic or injurious to humans, including children, or to cause acute or chronic health problems. This seal is currently replacing the previous non-toxic seals: CP (Certified Product), AP (Approved Product), and HL Health Label (Non-Toxic) over a 10-year phase-in period. Such products are certified by ACMI to be labeled in accordance with the chronic hazard labeling standard, ASTM D 4236, and the U. S. Labeling of Hazardous Art Materials Act (LHAMA). Additionally, products bearing the AP Seal with Performance Certification or the CP Seal are certified to meet specific requirements of material, workmanship, working qualities, and color developed by ACMI and others through recognized standards organizations, such as the American National Standards Institute (ANSI) and the American Society for Testing and Materials (ASTM). Some products cannot attain this performance certification because no quality standard currently exists for certain types of products.

For more information on AP seal and ACMI, please visit the ACMI website at:
http://www.acminet.org/safety.htm#three