Orchard hill covered sugar

Bone china

Bone china is a kind of porcelain body first used in England in which calcined ox bone, bone ash, is an essential ingredient. It is characterized by brilliant whiteness, strength and translucency. orchard hill covered sugar may be an example of this procedure.

The first use of bone ash in ceramics is assigned to Thomas Frye in 1748 in which he used it to make a type of soft-paste porcelain. In At the close of the eighteenth century, Josiah Spode undertook further developments, and consequently popularised it, by combining 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, four parts china stone, and six parts bone ash remains the standard English body.

Bone china production ordinarily makes use of a 2 stage firing process where the initial "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 under 1080°C (1976°F). orchard hill covered sugar is probably produced using this process.

Soft-paste porcelain

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

Its history dates from the initial struggles by potters from Europe to replicate Chinese porcelain by employing compositions of china clay and ground-up glass (also known as frit); soapstone and lime were known to have also been used in some concoctions. As these early combinations suffered from high pyroplastic collapse, or slumping in the kiln at raised temperature, they were uneconomic to manufacture. Formulations were later developed based on kaolin, nepheline syenite, feldspars, quartz 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 manufactured from a combination of the feldspathic rock petuntse and kaolin fired at extremely high temperature. It was first made in China in around the 9th century.

The secret of its manufacture was not known in Europe until the early 18th century, when Böttger of Meissen, Germany discovered the formula. In spite of attempts to keep it secret, the process was used by other German ceramic potteries and eventually became well used throughout Europe.

Hard-paste porcelain is known to be fired at a range of temperatures to create a multitude of different end results. Depending on the firing technique, hard-paste porcelain can be manufactured to resemble stoneware or earthenware. But mainly, it is unnecessary to employ hard-paste porcelain for these lower temperature ceramics. Hard-paste porcelain can be utilized to manufacture porcelain bisque, a hard crystalline material fired at very high temperatures in a pressure controlled environment. This method manufactures a translucent 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 Hummel, Lladro and Precious Moments utilize hard-paste porcelain simply for this reason, this could include orchard hill covered sugar.