Henley plate 10 5 8 inch

Bone china

Bone china is a kind of porcelain body first developed in Great Britain in which calcined ox bone, bone ash, is a critical part. It is characterised by brilliant whiteness, translucency and strength. henley plate 10 5/8 inch may be an example of this process.

The first use of bone ash in ceramics is attributed to Thomas Frye in in the late 1740s in which he used it to develop a type of soft-paste porcelain. In At the close of the 18th century, Josiah Spode undertook further developments, and consequently popularised it, by mixing it with china clay, kaolin and China stone to compete against the imported Oriental porcelain.

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

Bone china production routinely 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 heat less than 1080°C (1976°F). henley plate 10 5/8 inch is probably manufactured using this approach.

Soft-paste porcelain

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

Its origin dates from the early attempts by European potters to replicate Chinese porcelain by using mixtures of china clay and frit or ground-up glass; lime and soapstone were known to have also been added in some concoctions. As these initial compounds were prone to high pyroplastic collapse, or slumping in the kiln at high temperature, it was uneconomical to produce them. Formulations were later used based on kaolin, nepheline syenite, feldspars, quartz and other feldspathic rocks. These were technically superior and continue in production today.

Hard-paste porcelain

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

The secret of its manufacture was unknown in Europe until the early seventeen hundreds, when Böttger of Meissen, Germany uncovered the formula. Regardless of attempts to keep it secret, the procedure was taken up by other German ceramic potteries and finally became known throughout the whole of Europe.

Hard-paste porcelain is known to be fired at a range of temperatures to make a multitude of individual end results. Depending on the firing process, hard-paste porcelain can be made to resemble stoneware or earthenware. Mainly however, it is not necessary to utilize hard-paste porcelain for these lower temperature ceramics. Hard-paste porcelain can be used to manufacture porcelain bisque, a hard crystalline material fired at extremely high temperatures in a pressure controlled environment. This technique gives birth to a translucid bright white ceramic. Unlike other bisque ceramics, porcelain bisque is almost impermeable by water, therefore it becomes unnecessary to glaze the body before decorating. Manufacturers such as Lladro, Precious Moments and Hummel employ hard-paste porcelain just for this reason, this could include henley plate 10 5/8 inch.