I have tried a number of base glazes now, together with a couple of specific ones like Jeanine Vrines' orange. I started by going through books by Greg Daley and Linda Bloomfield, articles in Ceramic Review and Clay Craft, trying glazes suggested by senior colleagues and later using the Glazy website to get an idea of the effect of changing components of a glaze recipe. Information from ceramic material suppliers such as CTM and Potclays was also very helpful. My fifteenth glaze (UcA 4, a 4th adaptation of the UcLan transparent recipe, this one with Talc added ) appears to be the most promising yet. I have added glaze binder and applied three coats with a brush, then fired to 1260 in oxidation. This test tile is on Ashraf Hanna clay, but I tested UcA 3 on both ES 40 and Ashraf Hanna, and there was no appreciable difference in colour or fit. This green glaze has copper carbonate 4% and cobalt carbonate 0.15% added to the base recipe, plus twice as much of the glaze binder than those below. There are no bubbles so I will continue in my next attempts with more binder. Not all the oxide / stain combinations were good in this test series and some adjustments are needed, but at last I am hopeful, and feel I can progress from test tiles to trying them on the carved pieces.
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AuthorI am indulging my passion for ceramics by undertaking studies for an MA at UCLAN Archives
August 2021
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