Temper (pottery)
http://dbpedia.org/resource/Temper_(pottery)
A temper is a non-plastic material added to clay to prevent shrinkage and cracking during drying and firing of vessels made from the clay. Tempers may include:
* Bone;
* Chaff;
* Charcoal;
* Ground schist;
* Wood ash;
* Grit;
* Sand or crushed sandstone;
* Crushed limestone;
* Crushed igneous rocks, such as volcanic rock, feldspar, or mica;
* Grog;
* Plant fiber;
* Horse manure (dried and sifted);
* Crushed mollusc shells (including fossilized) (see Shell tempering in the Mississippian culture); and
* Freshwater sponge spicules.
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Temper (pottery)
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60494679
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1119695780
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A temper is a non-plastic material added to clay to prevent shrinkage and cracking during drying and firing of vessels made from the clay. Tempers may include:
* Bone;
* Chaff;
* Charcoal;
* Ground schist;
* Wood ash;
* Grit;
* Sand or crushed sandstone;
* Crushed limestone;
* Crushed igneous rocks, such as volcanic rock, feldspar, or mica;
* Grog;
* Plant fiber;
* Horse manure (dried and sifted);
* Crushed mollusc shells (including fossilized) (see Shell tempering in the Mississippian culture); and
* Freshwater sponge spicules. Some clays used to make pottery do not require the addition of tempers. Pure kaolin clay does not require tempering. Some clays are self-tempered, that is, naturally contain enough mica, sand, or sponge spicules that they do not require additional tempering.
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5840