Canterbury plate 10 5 8 inch

Bone china

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

The initial use of bone ash in ceramics is attributed to Thomas Frye in seventeen-forty-eight in which he used it to make a kind of soft-paste porcelain. In In the late 18th century, Josiah Spode carried on with further developments, and consequently popularized it, by combining it with kaolin, China stone and china clay to compete against the imported Oriental porcelain.

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

The manufacture of bone china routinely involves a two stage firing process where the first "biscuit" is fired without a glaze at 1280°C (2336°F) giving a semitransparent product and then it is glaze, or glost, fired at a lower temperature under 1080°C (1976°F). canterbury plate 10 5/8 inch is probably made using this approach.

Soft-paste porcelain

Soft-paste porcelain is a kind of porcelain and consequently a ceramic product.

Its origin dates from the initial attempts by European potters to clone Chinese porcelain by employing compounds of china clay and frit or ground-up glass; soapstone and lime were also known to have been included in some concoctions. As these early compositions were prone to high pyroplastic collapse, or slumping in the oven at high temperature, they were uneconomic to manufacture. Combinations were later produced based on kaolin, nepheline syenite, quartz, feldspars and other feldspathic rocks. These were technically superior and are still in production to this day.

Hard-paste porcelain

Hard-paste porcelain is a hard, dense ceramic that was originally manufactured from a mixture of the feldspathic rock petuntse and kaolin fired at extremely high temperature. It was first produced in China around the 9th century.

The secret of its manufacture was not known in Europe until the early seventeen hundreds, when Böttger of Meissen, Germany found the formula. Despite attempts to keep it secret, the procedure was taken up by other German ceramic factories and eventually became known throughout Europe.

Hard-paste porcelain is fired at a range of temperatures to create a myriad of individual end results. Depending on the firing method, hard-paste porcelain can be made to resemble earthenware or stoneware. But most of the time, it is not necessary to use hard-paste porcelain for such lower temperature ceramics. Hard-paste porcelain can be used to make porcelain bisque, a hard crystalline material fired at very high temperatures in a pressure controlled environment. This process generates a translucent bright white ceramic. Unlike other bisque ceramics, porcelain bisque is almost inpenetrable by water, making it unnecessary to glaze the body before decorating. Manufacturers such as Hummel, Lladro and Precious Moments utilize hard-paste porcelain just for this reason, this could include canterbury plate 10 5/8 inch.