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  2. Ceramic glaze - Wikipedia

    en.wikipedia.org/wiki/Ceramic_glaze

    The colour of a glaze after it has been fired may be significantly different from before firing. To prevent glazed wares sticking to kiln furniture during firing, either a small part of the object being fired (for example, the foot) is left unglazed or, alternatively, special refractory "spurs" are used as supports. These are removed and ...

  3. Conservation and restoration of ceramic objects - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    Dust and grease may be held on the surface loosely by electrostatic forces or weak chemical bonds and are easily removed. Some deposits, such as calcium salts, can be strongly adhered to a ceramic surface, especially if the surface is unglazed. There are two main methods in which ceramics are cleaned and treated: mechanically and chemically.

  4. Biscuit porcelain - Wikipedia

    en.wikipedia.org/wiki/Biscuit_porcelain

    The term "biscuit" refers to any type of fired but unglazed pottery in the course of manufacture, but only in porcelain is biscuit or bisque a term for a final product. Unglazed earthenware as a final product is often called terracotta, and in stoneware equivalent unglazed wares (such as jasperware) are often called "dry-bodied". Many types of ...

  5. Burnishing (pottery) - Wikipedia

    en.wikipedia.org/wiki/Burnishing_(pottery)

    Burnishing gives pottery a reflective surface without having to use a ceramic glaze. [5] It is described as a low-tech way of finishing pottery because burnished pottery needs to be fired below 1832F (1000C), which is different from firing glaze. [5] Burnishing can also be a step towards preparing pottery for pit firing, saggar firing, or raku. [5]

  6. Biscuit (pottery) - Wikipedia

    en.wikipedia.org/wiki/Biscuit_(pottery)

    This can be a final product such as biscuit porcelain or unglazed earthenware (such as terracotta) or, most commonly, an intermediate stage in a glazed final product. Confusingly, "biscuit" may also be used as a term for pottery at a stage in its manufacture where it has not yet been fired or glazed, but has been dried so that it is no longer ...

  7. Earthenware - Wikipedia

    en.wikipedia.org/wiki/Earthenware

    Earthenware is glazed or unglazed nonvitreous pottery [2] that has normally been fired below 1,200 °C (2,190 °F). [3] Basic earthenware, often called terracotta , absorbs liquids such as water. However, earthenware can be made impervious to liquids by coating it with a ceramic glaze , and such a process is used for the great majority of ...

  8. Glossary of pottery terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_pottery_terms

    Earthenware, usually reddish in colour and often unglazed. Some disciplines define it by the type of object made rather than the material. Used for sculptures and in archaeology for fired clay objects that are not pottery vessels. [18] Tin-glazed A ceramic glaze that is white, glossy and opaque, which is normally applied to red or buff earthenware.

  9. Pottery - Wikipedia

    en.wikipedia.org/wiki/Pottery

    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).

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