what is the difference from a pottery kiln and a ceramic kiln?
I want to buy a kiln to fire coffee cups I make out of coiling and pinch clay. Which type should I buy?
There should be no difference.
Because you are making functional ware, you want to be able to fully vitrify the clay body. If you are using an earthenware clay, your kiln will need to be able to fire to at least cone 6 (2232°F - 1222°C), but if you use a porcelain clay body, you will need a kiln capable of firing to cone 10 (2345°F - 1285°C)
Sometimes the term "ceramics" is used to refer to painting designs on pre-formed objects and then firing them, as opposed to pottery, which involves forming the piece as well as decorating it. In that sense, you want the "pottery" kind, since the glazes used in the "paint-your-own-ceramics" stuff are usually low temperature.
Simply look at the temperature rating of the kiln or the maximum cone number that it is rated for. Match that to the temperature necessary to fire your clay to maturity (usually expressed as a cone number by the supplier of the clay).
Using an Electric Pottery Kiln : Electric Pottery Kiln Shelf Grinding
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