English renaissance coffee cup

Bone china

Bone china is a type of porcelain body originally developed in Great Britain in which calcined ox bone, bone ash, is an essential constituent. It is characterized by extremely high whiteness, translucency and strength. english renaissance coffee cup may be an example of this process.

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

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

Bone china production mainly employs a two stage firing 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 setting below 1080°C (1976°F). english renaissance coffee cup is probably manufactured using this technique.

Soft-paste porcelain

Soft-paste porcelain is a type of porcelain and consequently a ceramic material.

Its history dates from the early struggles by potters from Europe to imitate Chinese porcelain by using compounds of china clay and frit or ground-up glass; soapstone and lime were also known to have been included in some combinations. As these initial concoctions suffered from high pyroplastic deformation, or slumping in the oven at high temperature, it was uneconomical to manufacture them. Compositions were later used based on nepheline syenite, feldspars, quartz, kaolin and other feldspathic rocks. These were technically superior and continue in production to this day.

Hard-paste porcelain

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

The secret of its manufacture was not known in Europe until 1709, when Böttger of Meissen, Germany found the formula. Despite attempts to keep it secret, the procedure was used by other German ceramic potteries and eventually became known throughout the length and breadth of Europe.

Hard-paste porcelain is fired at a range of temperatures to create many individual end results. Depending on the firing approach, hard-paste porcelain can be manufactured to resemble earthenware or stoneware. Generally however, it is unnecessary to use hard-paste porcelain for such lower temperature ceramics. Hard-paste porcelain can be utilized to make porcelain bisque, a hard crystalline product fired at very high temperatures in a pressure controlled environment. This method manufactures a semiopaque bright white ceramic. Unlike other bisque ceramics, porcelain bisque is almost impermeable by water, making it unnecessary to glaze the body before decorating. Manufacturers such as Precious Moments, Hummel and Lladro employ hard-paste porcelain exactly for this reason, this could include english renaissance coffee cup.