Fast cooling vs. slow cooling Alberta Slip GA6-A transparent base

Thursday 15th August 2013

These two mugs have the Alberta Slip base cone 6 GA6-A glaze on the inside. The left one is cooled normally (kiln off at cone 6 after soak). For the mug on the right the kiln has been soaked for half an hour at 1800F on the way down. This was done to develop the rutile blue glaze on the outside, but during this period crystallization occurred on the inside. If you need to cool slow (for the Alberta Slip rutile blue) but would like the transparent liner, add 0.5-1% tin oxide to the GA6-A to impede crystal growth.

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GA6-A - Alberta Slip Cone 6 Amber Base Glaze, Crystallization

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