Clay used for the manufacture of ceramic objects there that can instantly be used and there is also a lack of appropriate meempunyai character. The nature of such mismatches is too sticky, too coarse, less plastic, high shrinkage, the results of fuel brittle, the color is too dark or bright, precocious, broke out when drying, and broke when burning. Problems can be detected when the process of forming, drying, incineration, or by viewing the visualization of the burning of ceramic objects.
To overcome these problems, the first to be identified whether the problem is caused by the material, process, or both. For the problem caused by the process, then the solution is to fix the process that is run according to the procedure. Errors that often happens is that the process is not good so pengulian ceramic body is not homogeneous and connection between the parts that are less good at engineering the establishment of a direct hand.
As for the problem caused by the weakness of the ceramic body itself is presented in the following table.
51. Picture objects broken / cracked during drying and burning
Table 5. Problem clay bodies and repairs.
The table should be well understood in order to avoid failure results akhir.Karena good product must start with good material quality as well.