Ceramic piece which is processed by Hydroplastic or Slip casting techniques is dried and fired. Before firing the ceramic piece is said to be ‘green’ (Machining is done preferably at this stage)
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Drying is a process in which the water content in the ceramic is removed. As the ceramic dries it also experiences shrinkage. The drying rate is controlled by temperature and humidity.
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After drying the ceramic piece is fired at high temperatures between 900 and 1400oC. The firing temperature depends on the composition and the desired property of the finished piece. During firing the density of the ceramic piece increases.