Bone China, also known as bone China, began to be produced in Britain. It is generally believed that Josiah Spode (1755- 1827) was the first Englishman who successfully made bone China. Josia Spode directly mixed calcined bone with porcelain clay and mineral flux to become the traditional raw material of hard porcelain, which was successfully tested in the early19th century. The basic process is a kind of porcelain made of animal bone charcoal, clay, feldspar and timely, which is fired twice by high-temperature plain firing and low-temperature glaze firing.
The main characteristics of bone China:
(1) beautiful: porcelain is delicate and transparent, with beautiful and elegant shape, moist and bright color surface and colorful flower surface.
(2) High-grade: produced in Britain, it has long been a special porcelain for the British royal family and nobles. It is the only recognized high-grade porcelain species in the world, which has dual values of use and art, is a symbol of rights and status, and is known as the king of porcelain.
(3) Process: secondary firing, complicated process, only produced in Britain, China, South Korea, Japan, Germany, Russia and Thailand.
(4) Processing difficulty: In the firing process, the requirements for its uniformity, whiteness, transparency, thermal stability and other physical and chemical indicators are extremely high, resulting in a high rejection rate.
White porcelain is a classification of traditional porcelain in China (celadon, blue-and-white porcelain, painted porcelain and white porcelain). It is made of porcelain blank with low iron content and fired with pure transparent glaze.
The characteristics of white porcelain:
It has the characteristics of compact and transparent body, high firing degree of glaze and pottery, no water absorption and long sound and rhyme.