Porcelain composed of bone ash, feldspathic material, and kaolin
Staffordshire bone china covered chocolate cabinet cup, with enamels and gilding, c. 1815–20, Victoria and Albert Museum
Bone china is a type of vitreous, translucent pottery,[1] the raw materials for which include bone ash, feldspathic material and kaolin. It has been defined as "ware with a translucent body" containing a minimum of 30% of phosphate derived from calcined animal bone or calcium phosphate.[2] Bone china is amongst the strongest of whiteware ceramics, and is known for its high levels of whiteness and translucency.[3][4] Its high strength allows it to be produced in thinner cross-sections than other types of whiteware.[3] Like stoneware, it is vitrified, but is translucent due to differing mineral properties.[5]
In the mid-18th century, English potters had not succeeded in making hard-paste porcelain (as made in East Asia and Meissen porcelain), but found bone ash a useful addition to their soft-paste porcelain mixtures. This became standard at the Bow porcelain factory in London (operating from around 1747), and spread to some other English factories. The modern product was developed by the Staffordshire potter Josiah Spode in the early 1790s. Spode included kaolin, so his formula, sometimes called "Staffordshire bone-porcelain", was effectively hard-paste, but stronger, and versions were adopted by all the major English factories by around 1815.[6]
From its initial development and up to the latter part of the 20th century, bone china was almost exclusively an English product, with production being very largely localised in Stoke-on-Trent.[7] Most major English firms made or still make it, including Spode, and Worcester, Royal Crown Derby, Royal Doulton, Wedgwood, and Mintons. In the 20th century it began to be made elsewhere, including in Russia, China, and Japan. China is now the world's largest manufacturer.
In the UK, references to "china" or "porcelain" can refer to bone china, and "English porcelain" has been used as a term for it, both in the UK and around the world.[8]
^Dictionary of Ceramics. A. E. Dodd & D. Murfin. The Institute Of Minerals & Maney Publishing. 1994
^By The British Pottery Manufacturers' Federation, and quoted in Dictionary Of Ceramics. Arthur Dodd & David Murfin. 3rd edition. The Institute Of Minerals. 1994-1995.
^ abOzgundogdu, Feyza Cakir. “Bone China from Turkey” Ceramics Technical; May2005, Issue 20, p29-32.
^'Trading Places.' R.Ware. Asian Ceramics. November,2009, p.35,37-39
^What is China? As with stoneware, the body becomes vitrified; which means the body fuses, becomes nonabsorbent, and very strong. Unlike stoneware, china becomes very white and translucent. Archived 2015-06-14 at the Wayback Machine
^Honey, W.B., Old English Porcelain: A Handbook for Collectors, p. 4-5, 410-411, 1977, 3rd edn. revised by Franklin A. Barrett, Faber and Faber, ISBN 0571049028
^Cite error: The named reference Trading Places 2009, p.35,37 was invoked but never defined (see the help page).
^Osborne, Harold (ed), The Oxford Companion to the Decorative Arts, p. 130, 1975, OUP, ISBN 0198661134; Faulkner, Charles H., "The Ramseys at Swan Pond: The Archaeology and History of an East Tennessee Farm, p.96, 2008, Univ. of Tennessee Press, 2008, ISBN 1572336099, 9781572336094; Lawrence, Susan, "Archaeologies of the British: Explorations of Identity in the United Kingdom and Its Colonies 1600-1945", p. 196, 2013, Routledge, ISBN 1136801928, 781136801921
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