Runnymeade blue plate 9 inch

Bone china

Bone china is a kind of porcelain body originally developed in the UK in which calcined ox bone, bone ash, is an essential constituent. It is characterized by brilliant whiteness, strength and translucency. runnymeade blue plate 9 inch may be an example of this procedure.

The initial use of bone ash in ceramics is assigned to Thomas Frye in seventeen-forty-eight in which he used it to introduce a type of soft-paste porcelain. In At the close of the eighteenth century, Josiah Spode undertook further developments, and subsequently popularised it, by combining it with China stone, kaolin and china clay to compete against the imported Oriental porcelain.

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

Bone china production usually employs a two stage firing process where the first "biscuit" is fired without a glaze at 1280