CactusPots Posted June 5, 2019 Report Share Posted June 5, 2019 I'm thinking of adding a low fire lava glaze to my already cone 10 fired sculpture type pieces to add detail. I have a 1966 glaze book from Southern Connecticut State College. Professor of Ceramics David Crespi (anyone?). Anyway, it has several lava glazes both in cone 06, which is what I expect, but also cone 10. Most all of the glazes don't include silicon carbide. Question: How would this glaze provide the lava bubbles I would expect to see from silicon carbide? Pretty familiar with that since my silicon carbide shelves react with bubbles to most glaze drips. Of course I'll run test tiles before I do anything serious. Yellow Brown Lava Cone 06-04 Frit 3134 70 EPK 10 Zircopax 2 Zinc Ox 3 Rutile 12 Barium C 2 Mang Carb 2 Link to comment Share on other sites More sharing options...
liambesaw Posted June 5, 2019 Report Share Posted June 5, 2019 No idea, that has pretty low LOI. Is there a picture in the book? Could be that the zinc, barium and manganese offgas at just the right time during the melt. Link to comment Share on other sites More sharing options...
CactusPots Posted June 5, 2019 Author Report Share Posted June 5, 2019 I got this "book" at a used book store in a pile of really old Ceramics Monthly. The type comes directly off a typewriter (remember those?). It's sort of a periodical format, with staples. No pictures, no captions on the glazes. You have to reference the number (57E) and go to a index in the back to get the label. Probably 200-250 glazes. I have gotten one working but difficult glaze from it. You have seen working lava glazes that don't use silicon carbide? Link to comment Share on other sites More sharing options...
liambesaw Posted June 5, 2019 Report Share Posted June 5, 2019 I have not, but I also haven't done any lowfire stuff. Link to comment Share on other sites More sharing options...
MFP Posted July 13, 2019 Report Share Posted July 13, 2019 Will this work? Marilee’s Lava Glaze (Cone 6, oxidation or reduction) Whiting. 23.91 % Custer Feldspar . 49.73 Edgar Plastic Kaolin . 13.18 Flint. 13.18 100.00 % Add: Titanium Dioxide. 11.29 % Silicon Carbide. 3.4% A Very rough glaze; not intended for food surfaces. Fine silicon carbide seems to work best. For a gray to black variation, add 7% Mason stain 6600. From Rick Malmgren, Ceramics Monthly, October 2000. mid-range mid-range mid-range mid-range Link to comment Share on other sites More sharing options...
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