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The clay is Plainsman 3B. Without processing, other than grinding to 42 mesh, it fires as shown on the left (at cone 6, 8, 9, 10 and 10R bottom to top). The speckle and bloating are caused by impurity iron-bearing particles and others having an LOI (they decompose and produce gases that cause the bloats). These particles make up a small percentage, they can be removed by sieving to produce a body of porcelain-strength and density. This natural porcelain fully vitrifies by cone 6 (the middle bar). Only about 5% of the material was removed to produce this amazing product (which I call MNP).
Projects |
Make your own sieve shaker to process ceramic slurries
All you need is an inexpensive vibration motor from Amazon, a five-gallon pail, some metal and welding and 3D-printed collars to hold the sieve in place. |
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