Same glaze, same M340 clay, same firing. Why is one more speckled?
Thursday 16th June 2016
These are jiggered lids made from Plainsman M340 cone 6 stoneware. The one on the right was sponged in the dry stage to smooth issues that occurred during jiggering. That has exposed speck-producing particles that were under the surface. However that is not the only possible factor. This body is made from quarried materials that are ground to 42 mesh. So speckle variation can be expected because it is derived from natural iron pyrites in the clay (they can vary in concentration, hardness and color intensity).
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