Deb B Posted December 11, 2010 Report Share Posted December 11, 2010 OOPS! I recently mixed a 5 gallon bucket of Randy's Red ^5-6 and inadvertently used Custer Feldspar instead of Kona (F-4),,,, it came out a very translucent ugly brown vs the characteristic brick red. Is there anything I can now add to fix it? Or should I just dump it out and start over? Kona (F-4) Feldspar -- 20% Gerstley Borate -- 31% EPK -- 5% Talc -- 14% Silica -- 30% ------------------------- 100% Iron Oxide 15% Bentonite 2% Link to comment Share on other sites More sharing options...
Marcia Selsor Posted December 11, 2010 Report Share Posted December 11, 2010 I think you'll have to start over. F-4 is a soda Feldspar and Custer and G-200 are potash feldspars. They real impact the glaze character significantly. I think you'd have to go a long way to figure out how to save the batch. I'd start over for Randy's Red. Do tests with the bad batch to come up with some decent looking liners. Maybe add an opacifier and more colorants or leave it translucent and add colorants. Don't throw it out, just modify. It is not going to ever be Randy's red, but you could get something interesting with it. Some of my favorite glazes were screw ups. I am still mixing them because I know where I screwed up. It is good to always keep notes when mixing. Marcia Link to comment Share on other sites More sharing options...
Deb B Posted December 11, 2010 Author Report Share Posted December 11, 2010 I think you'll have to start over. F-4 is a soda Feldspar and Custer and G-200 are potash feldspars. They real impact the glaze character significantly. I think you'd have to go a long way to figure out how to save the batch. I'd start over for Randy's Red. Do tests with the bad batch to come up with some decent looking liners. Maybe add an opacifier and more colorants or leave it translucent and add colorants. Don't throw it out, just modify. It is not going to ever be Randy's red, but you could get something interesting with it. Some of my favorite glazes were screw ups. I am still mixing them because I know where I screwed up. It is good to always keep notes when mixing. Marcia Thanks Marcia, that's kind of what I was thinking too. I like the idea of adding an opacifier and more colorants just to see what happens. I'll probably do it in smaller batches rather than the entire 5 gallon bucket. I have a very nice cone 10 blue glaze that I added the wrong oxide to and turned out to be a beautiful blue! Link to comment Share on other sites More sharing options...
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