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Porcelain dish, Chinese Qing, 1644–1911, Hard-paste decorated in underglaze cobalt blue V&A Museum no. 491-1931 [1] Victoria and Albert Museum, London. Hard-paste porcelain, sometimes called "true porcelain", is a ceramic material that was originally made from a compound of the feldspathic rock petuntse and kaolin fired at a very high temperature, usually around 1400 °C.
Ceramic glaze, or simply glaze, is a glassy coating on ceramics. It is used for decoration, to ensure the item is impermeable to liquids and to minimize the adherence of pollutants. [1] Glazing renders earthenware impermeable to water, sealing the inherent porosity of earthenware. It also gives a tougher surface.
The permanent swelling of a ceramic article during firing caused by the evolution of gases. Blunging The energetic mixing of ceramic raw materials, especially clays, with water to produce slip or slurry. Undertaken in large tanks called blungers. [2] Body The structural portion of a ceramic article, or the material or mixture from which it is made.
Hard-paste porcelain was invented in China, and it was also used in Japanese porcelain.Most of the finest quality porcelain wares are made of this material. The earliest European porcelains were produced at the Meissen factory in the early 18th century; they were formed from a paste composed of kaolin and alabaster and fired at temperatures up to 1,400 °C (2,552 °F) in a wood-fired kiln ...
All clear or translucent varnishes, and indeed all film-polymer coatings (e.g. paint, stain, epoxy, synthetic plastic, etc.) are susceptible to this damage in varying degrees. Pigments in paints and stains protect against UV damage. UV-absorbers are added to polyurethane and other varnishes (e.g. spar varnish) to work against UV damage but are ...
Macor is a white, odorless, porcelain-like glass ceramic material and was developed originally to minimize heat transfer during crewed spaceflight by Corning Inc. [18] StellaShine, launched in 2016 by Nippon Electric Glass Co., is a heat-resistant, glass-ceramic material with a thermal shock resistance of up to 800 degrees Celsius. [19]
The first known pottery in Bastrop County was established by Matthew Duncan, also spelled Dunkin, in 1855 when he bought 10 acres on Alum Creek in the Bastrop Town Tract, now Bastrop State Park, to build a shop. [2] Following Duncan's death (1880), his business, Randolph Manufacturing aka Dunkin Jug Factory, was sold to Milton Stoker.
Conservation and restoration of ceramic objects is a process dedicated to the preservation and protection of objects of historical and personal value made from ceramic. Typically, this activity of conservation-restoration is undertaken by a conservator-restorer , especially when dealing with an object of cultural heritage .
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