Valencia plate 10 5 8 inch

Bone china

Bone china is a type of porcelain body first developed in Britain in which calcined ox bone, bone ash, is a critical ingredient. It is characterised by high whiteness, strength and translucency. valencia plate 10 5/8 inch may be an example of this process.

The first use of bone ash in ceramics is credited to Thomas Frye in seventeen-forty-eight in which he used it to introduce a kind of soft-paste porcelain. In In the late 18th century, Josiah Spode undertook further developments, and consequently made it popular, by combining it with china clay, China stone and kaolin to compete with the imported Oriental porcelain.

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

The production of bone china ordinarily uses a 2 stage firing process where the initial "biscuit" is fired without a glaze at 1280