About: Temper (pottery)

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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.

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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. (en)
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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. (en)
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  • Temper (pottery) (en)
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