Orchard hill soup cereal bowl

Bone china

Bone china is a type of porcelain body first produced in the United Kingdom in which calcined ox bone, bone ash, is an important ingredient. It is distinguish by supreme whiteness, translucency and strength. orchard hill soup/cereal bowl may be an example of this procedure.

The initial use of bone ash in ceramics is credited to Thomas Frye in in the late 1740s in which he used it to make a kind of soft-paste porcelain. In As the eighteenth century drew to a close, Josiah Spode carried on with further developments, and subsequently popularised 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, three and a half parts china clay, and six parts bone ash remains the standard English body.

Bone china production generally makes use of a two stage firing process where the first "biscuit" is fired without a glaze at 1280°C (2336°F) giving a semiopaque product and then it is glaze, or glost, fired at a lower temperature less than 1080°C (1976°F). orchard hill soup/cereal bowl is probably manufactured using this technique.

Soft-paste porcelain

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

Its origin dates from the first undertakings by potters from Europe to clone Chinese porcelain by using concoctions of china clay and ground-up glass (otherwise known as frit); soapstone and lime were also known to have been used in some compounds. As these early compositions suffered from high pyroplastic collapse, or slumping in the kiln at raised temperature, they were not economical to manufacture. Formulations were later developed based on nepheline syenite, quartz, feldspars, 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Hard-paste porcelain is a hard, dense ceramic that was originally made from a formulation of the feldspathic rock petuntse and kaolin fired at extremely high temperature. It was first produced in China in around the ninth century.

The secret of its manufacture was not known in Europe until the early 1700s, when Böttger of Meissen, Germany uncovered the formula. In spite of attempts to keep it secret, the process spread to other German ceramic potteries and eventually became widely known throughout the whole of Europe.

Hard-paste porcelain is known to be fired at a range of temperatures to manufacture a multitude of different end results. Depending on the firing approach, hard-paste porcelain can be made to resemble earthenware or stoneware. But generally, it is unnecessary to make use of hard-paste porcelain for these lower temperature ceramics. Hard-paste porcelain can be employed to create porcelain bisque, a hard crystalline material fired at very high temperatures in a pressure controlled environment. This method gives birth to a translucid bright white ceramic. Unlike other bisque ceramics, porcelain bisque is almost inpenetrable by water, therefore it becomes unnecessary to glaze the body before decorating. Manufacturers such as Precious Moments, Hummel and Lladro use hard-paste porcelain exactly for this reason, this could include orchard hill soup/cereal bowl.