Stone Spiral Posted March 22, 2017 Report Share Posted March 22, 2017 Last night I finally went through the glazes and glaze materials that I inherited for my studio.I found a container of mixed, dried materials marked as so: 750g Kaolin EPK 750g Dolomite 300g Gerstley Borate It seems very intentionally mixed and labelled. I weighed it at it does add up to 1800g, so none used yet. What do you think? I have searched recipes on the internet that call for 42% Kaolin EPK, 42% Dolomite, and 16% Gerstley Borate,as well as 50/50 Kaolin & Dolomite, plus 20% Gerstley Borate added. I hate to toss perfectly good materials! If you know what this is, or have recipes that might call for these ingredients in these proportions (which I could just add other materials to), I would be grateful to hear your ideas! Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted March 22, 2017 Report Share Posted March 22, 2017 I'm guessing you didn't get the glaze book of the person who's studio stuff you've come into. What was this other artist's work like? What did hey make? I think it's a low fire engobe of some kind, although if someone has a different opinion, I'd go with that one. I had a quick pass at it in Insight, and it doesn't fall properly within any glaze limits there, so it's very unbalanced (low silica) as a glass. I hope this isn't someone's idea of a matte white cone 6 glaze. My first impulse is to tell you that none of those ingredients are expensive or rare, and 1800g really isn't that much. I think you should just chuck it. You'll spend a bunch of time testing it, trying to figure out if it's something you actually like, and then figuring out how to incorporate it into your work. It's a backwards method of working, regardless of your involvement level in clay. Your time is more valuable than that. Link to comment Share on other sites More sharing options...
Pres Posted March 22, 2017 Report Share Posted March 22, 2017 I think what you have is a mix that he made up of specifics for a series of glazes that used the same materials. This probably had one of the frits added to it or some other materials to complete a some different glazes. best, Pres Link to comment Share on other sites More sharing options...
Joseph Fireborn Posted March 23, 2017 Report Share Posted March 23, 2017 I like Callie's solution. 1800G is nothing. Toss it the effort isn't worth the investigation. Link to comment Share on other sites More sharing options...
Stone Spiral Posted March 23, 2017 Author Report Share Posted March 23, 2017 Thanks. I guess I will toss it. I have already tossed more than 40 yogurt containers of homemade glazes, and about 8 5-gallon buckets of glaze. I was being ruthless (and realistic) about what I would use and what I wouldn't, as well as what was worth keeping (if only a few tbsp left with no recipe to repeat... tossed it) I kept all the ^6 glazes that had enough available to do something with, and/or the ones she left the recipes for (and so could be repeated, if liked) When I came across this I was hoping it would be something easy, like "oh that's X, just add Y and you've got Z!" but... alas, back to the Earth it goes! Thanks. Link to comment Share on other sites More sharing options...
Babs Posted March 23, 2017 Report Share Posted March 23, 2017 Could do a search lusting these ibgred. Link to comment Share on other sites More sharing options...
Stone Spiral Posted March 23, 2017 Author Report Share Posted March 23, 2017 Could do a search lusting these ibgred. I did a Google search of the ingredients, both in quotations marks and not in quotation marks, as well as with amounts... in grams and percentages. I also peeked through several of my pottery reference books, looking to see if any recipes have those three ingredients as a base, and I don't see them paired together in those ratios anywhere! Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted March 24, 2017 Report Share Posted March 24, 2017 I would make a guess at some sort of englobe (slip) too. Doesn't look like a glaze Link to comment Share on other sites More sharing options...
Babs Posted March 24, 2017 Report Share Posted March 24, 2017 If you're going to toss it, just mix to an engine thickness and apply to pot then t glaze consistency and apply to pot and test. Link to comment Share on other sites More sharing options...
Guest JBaymore Posted March 27, 2017 Report Share Posted March 27, 2017 Ran it in Insight... could be a crappy cone 3 glaze....or a really crappy cone 6 glaze. (low in boron....very low in silica.) EP Kaolin................... 750.000 Dolomite.................... 750.000 Gerstley Bor (99)....... 300.000 ========= 1800.000 CaO 0.545* MgO 0.435* K2O 0.003* Na2O 0.016* P2O5 0.001* TiO2 0.004 Al2O3 0.314 B2O3 0.120 SiO2 0.721 Fe2O3 0.004 Calculated LOI: 29.758 Si:Al: 2.295 SiB:Al: 2.679 Thermal Expansion: 6.980 Formula Weight: 134.230 Link to comment Share on other sites More sharing options...
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