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Clay is a type of fine-grained natural soil material containing clay minerals [1] (hydrous aluminium phyllosilicates, e.g. kaolinite, Al 2 Si 2 O 5 ( OH) 4 ). Most pure clay minerals are white or light-coloured, but natural clays show a variety of colours from impurities, such as a reddish or brownish colour from small amounts of iron oxide.
Ceramic material is an inorganic, metallic oxide, nitride, or carbide material. Some elements, such as carbon or silicon, may be considered ceramics. Ceramic materials are brittle, hard, strong in compression, and weak in shearing and tension. They withstand the chemical erosion that occurs in other materials subjected to acidic or caustic ...
Pottery is the process and the products of forming vessels and other objects with clay and other raw materials, which are fired at high temperatures to give them a hard and durable form. The place where such wares are made by a potter is also called a pottery (plural potteries ). The definition of pottery, used by the ASTM International, is ...
A pinch pot is a simple form of hand-made pottery produced from ancient times to the present. The pinching method is to create pottery that can be ornamental or functional, and has been widely employed across culture. The method used is to simply have a lob of clay, then pinch it to the shape desired. Pinch pots are the simplest and fastest way ...
The Babylonian Plimpton 322 clay tablet, with numbers written in cuneiform script. Believed to have been written about 1800 BCE, this table lists two of the three numbers in what are now called Pythagorean triples. Text on clay tablets took the forms of myths, fables, essays, hymns, proverbs, epic poetry, business records, laws, plants, and ...
Porcelain ( / ˈpɔːrs ( ə) lɪn /) is a ceramic material made by heating raw materials, generally including kaolinite, in a kiln to temperatures between 1,200 and 1,400 °C (2,200 and 2,600 °F). The greater strength and translucence of porcelain, relative to other types of pottery, arise mainly from vitrification and the formation of the ...
When clay is first dug out of the ground it is full of rocks and shells and other useless items that need to be removed. To do this the potter mixes the clay with water and lets all the impurities sink to the bottom. This is called levigation or elutriation. This process can be done many times. The more times this is done, the smoother clay ...
Coiling is a method of creating pottery. It has been used to shape clay into vessels for many thousands of years. It is found across the cultures of the world, including Africa, Greece, China, and Native American cultures of New Mexico. Using the coiling technique, it is possible to build thicker or taller walled vessels, which may not have ...
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