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Thus, the maximum temperature within a kiln is often held constant for a period of time to soak the wares to produce the maturity required in the body of the wares.

The atmosphere within a kiln during firing can affect the appearance of the finished wares.

In the case of porcelain, where different materials and higher firing-temperatures are used, the physical, chemical and mineralogical properties of the constituents in the body are greatly altered.

In all cases, the object of firing is to permanently harden the wares and the firing regime must be appropriate to the materials used to make them.

These can then be altered by impressing, bulging, carving, fluting, and incising.

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Each of these different clays are composed of different types and amounts of minerals that determine the characteristics of resulting pottery.Firing pottery can be done using a variety of methods, with a kiln being the usual firing method.Both the maximum temperature and the duration of firing influences the final characteristics of the ceramic.Once a clay body has been kneaded and de-aired or wedged, it is shaped by a variety of techniques. There are several materials that are referred to as clay.The properties which make them different include: Plasticity, the malleability of the body; the extent to which they will absorb water after firing; and shrinkage, the extent of reduction in size of a body as water is removed.




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