Darjeeling teapot large

Bone china

Bone china is a kind of porcelain body first used in Britain in which calcined ox bone, bone ash, is a critical constituent. It is distinguish by extremely high whiteness, strength and translucency. darjeeling teapot large may be an example of this process.

The first use of bone ash in ceramics is associated with Thomas Frye in 1748 in which he used it to make a type of soft-paste porcelain. In In the late 18th century, Josiah Spode continued with further developments, and consequently made it popular, by mixing it with china clay, kaolin and China stone to compete with the imported Oriental porcelain.

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

Bone china production routinely involves a 2 stage firing where the initial "biscuit" is fired without a glaze at 1280