A general term for unfired clay products is "greenware." The exact designation of unfired clay, however, depends on the stage of dryness. In order by increasing dryness, clay can become soft leatherhard, firm leatherhard, velvet and bone dry.
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bisque is the name of the hardened clay called after the first firing in the kiln.
Clay is fired in a kiln.
You'd have a salt reaction with the clay body and depending on firing temp achieve a salt fired piece...
The cone rating of a clay or glaze is the temperature at which the clay matures. So if a cone 10 clay is fired to cone 5, the resulting pot will not be completely matured. This may or may not cause a problem, depending on what the piece is used for. For example, a cone 10 porcelain which is fired to cone 5 and not glazed will still be somewhat porous.
Bisque is the general term for any unglazed clay that has been fired. In high fire pottery a piece is generally fired without glaze at a lower temperature and then glazed and fired at a higher temperature.