Porcelain single operation. In this process, "green" (unfired) ceramic wares are heated to high temperatures in a kiln to permanently set their shapes. Porcelain is fired at a higher temperature than earthenware so that the body can vitrify and become non-porous. Porcelain originated in China, and it took a long time to reach the modern material. Until recent times, almost all East Asian porcelain was of the hard-paste type. There is no precise date to separate the production of proto-porcelain from that of porcelain. Although proto-porcelain wares exist dating from the Shang dynasty (1600–1046 BC), by the time of the Eastern
Van Tilburg Collection (1465-1487), Hongzhi (1488-1505), Zhengde (1506-1521), Jiajing (1522-1566) and Wanli (1573-1619) wares are found in the Collection. Noteworthy Kangxi (1662-1722) and Qianlong (1736-1795) pieces are the large blue-and-white porcelain chargers, the underglaze red pots and blue-and-white ritual stand with two side vases. There are numerous polychrome Kangxi 'Famille verte' and Qianlong 'Famille rose' plates in the collection. The collection holds a pair of 'Famille noire' pots which belonged to the Kangxi Emperor. There are also a number of Imperial Japanese pieces in the collection, among them a blue-and-white Arita gendi with Arabian ormulo mouldings, an early 19th-century blue-and-white Arita charger decorated