Babs Posted January 20, 2016 Report Share Posted January 20, 2016 Just wondering, can you tell by just reading whether a glaze will be more suited/attractive by firing in reduction or oxidation? I liked a glaze I saw called variegated slate blue, but it was only coming across the same glaze again that I noticed it was labelled for reduction. the colourants were rutile and copper carb from memory so if fired in oxidation...it would be more what?? green? less variegated? Link to comment Share on other sites More sharing options...
bciskepottery Posted January 20, 2016 Report Share Posted January 20, 2016 Mastering Cone 6 glazes has a glaze named Variegated Slate Blue. It works in both oxidation and reduction. MC6G glazes were developed for electric oxidation; some have been found to work in reduction also. http://www.masteringglazes.com/mastering-cone-6-glazes/glazes/variegated-slate-blue-figur.html Link to comment Share on other sites More sharing options...
Babs Posted January 20, 2016 Author Report Share Posted January 20, 2016 Thanks, this is the glaze I think but was just wondering, I no longer have a gas kiln, whether just by the recipe one can predict whether a glaze will "work" and what leads to this prediction. Link to comment Share on other sites More sharing options...
Dick White Posted January 20, 2016 Report Share Posted January 20, 2016 The Variegated Slate Blue in Mastering Cone 6 Glazes has rutile, cobalt, and copper in it. I have fired it in both oxidation and reduction, and it is beautiful either way. As for being able to predict how a glaze will come out in oxidation or reduction just by looking at the recipe, you can only do that for some well known types of glaze, such as copper reds. Those will be red only in reduction, and will be turquoise-y aqua in oxidation. Other types of glazes, such as shinos and tenmokus generally only work in reduction and are blah in oxidation. Yet others, such as glazes with zinc oxide as a flux will fail in reduction. Frequently, you can only learn by testing it. Link to comment Share on other sites More sharing options...
Babs Posted January 20, 2016 Author Report Share Posted January 20, 2016 Thanks Dick, what I was needing to read. Link to comment Share on other sites More sharing options...
LinR Posted January 20, 2016 Report Share Posted January 20, 2016 I use Variegated Slate Blue in my small gas kiln. I have had to adjust it slightly for shivering...the fit with the clay I use? The kiln does not give me uniform reduction but the glaze works well whatever the atmosphere. I have never had any hint of red from this glaze. Lin Link to comment Share on other sites More sharing options...
Babs Posted January 21, 2016 Author Report Share Posted January 21, 2016 Copper reds are a different beast. Link to comment Share on other sites More sharing options...
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