Bone ash makes up about 50% by weight of the final Bone China body recipe. It is produced from animal bone, which is first processed to remove any adhering meat which is generally sold as pet food. The bone is then treated to remove glue, which is processed and upgraded for use in applications where glue is used, and also for the sizing of expensive paper. The remaining raw bone is then heated to over 1000 C to burn off any residual organic material and change the structure of the bone to a form suitable for the manufacture of bone china. The high temperature used also sterilises the bone. The bone is ground with water to a fine particle size before inclusion in the bone china body.