Berkshire rim soup 9 inch

Bone china

Bone china is a type of porcelain body first used in the United Kingdom in which calcined ox bone, bone ash, is an essential constituent. It is characterised by extreme whiteness, strength and translucency. berkshire rim soup 9 inch may be an example of this process.

The initial use of bone ash in ceramics is attributed to Thomas Frye in the mid eighteenth century in which he used it to develop a kind of soft-paste porcelain. In As the 18th century drew to a close, Josiah Spode continued with further developments, and consequently popularized it, by mixing it with china clay, kaolin and China stone to compete against the imported Oriental porcelain.

The initial elementary formula of three and a half parts china clay, six parts bone ash, and four parts china stone still remains the standard English body.

The manufacture of bone china routinely involves a two stage firing where the first "biscuit" is fired without a glaze at 1280