Please note: This posting is not about the glaze formula or the glaze itself. It is about using alumina and/or alumina/silica additions to existing glossy glazes to manipulate them from glossy in stages including semi-gloss, semi-matte (satin), and dry matte. I realize that these additions will affect the unity formula of the glaze, particularly with the finer particles of the addition. I do, however, think it is possible that the crystalline form of these additions may behave differently than an addition of the clay form of alumina/silica, particularly the larger particles of these additions. Having said that, here is the glaze formula. It was chosen because it is a very fluid glaze at cone six that is almost impossible to use by pouring and dipping: George Mason Green (soft cone six oxidation) Neph Syn-33 Gert Borate-23 Strontium Carb-20 EPK-3.5 Flint-20.5 Copper Carb-8 If you zoom in on each standup tile you can see what and how much was added to the glaze (20%). The upper right side of tile was dipped diagonally with the original glaze. That side of each test ran quite a lot. If you look at the left side of each tile, the glaze did not move at all. The flat tile in front of each standup tiles shows the addition of 10% of that additive. The vertical line in the middle was a small swatch of the original glaze on top. The clay body is Standard 240 White Stoneware I’m not sure what all this means, but here it is for your reactions.
Posted on: Tue, 08 Apr 2014 19:07:15 +0000
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