Matt Oz Posted June 9, 2015 Report Share Posted June 9, 2015 I like to do a lot of experiments formulating translucent cone 6 porcelain bodies and wanted to show the difference in translucency of kaolins. I use this recipe with Grolleg and did not compensate for more refractory kaolin's when mixing up test batches, but from doing various tests in the past these results seem close enough. Cone 6 Porcelain 50 Kaolin 20 Silica 325 mesh 20 G-200 feldspar 4 Talc 1 Veegum T 5 Wollastonite Add: 2 Frit 3134 2 Bentonite For the test tiles I give the percentage of titanium and iron that the kaolins contain, referencing digitalfire.com with each sample because: Titanium (TiO2) affects translucency and color. Iron (Fe2O3) affects color, and less so translucency. Tiles are approximately 3/32" thick (2.4 mm), fired in an electric kiln. Back lit with led bulb. Left to right: New Zealand Halloysite (kaolin) TiO2___0.05% 2nd lowest Fe2O3_ 0.25% Lowest Grolleg TiO2___0.03% Lowest Fe2O3_ 0.70% 2nd highest EPK TiO2___0.37% 2nd highest Fe2O3_ 0.79% Highest #6 Tile TiO2___1.40% Highest Fe2O3_ 0.50% 2nd lowest Link to comment Share on other sites More sharing options...
Benzine Posted June 9, 2015 Report Share Posted June 9, 2015 Excellent. Nice work, and thanks for sharing. Link to comment Share on other sites More sharing options...
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