MFP Posted April 26, 2021 Report Share Posted April 26, 2021 I have been hunting for my previous cone 10 Ohata Red glaze recipe adjusted for new feldspars. I have found the following recipe which appears correct minus the gerstly borate and lithium carbonate. I am asking if I remove those fluxes if this will be a cone 10 glaze please? erial Amount Custer Feldspar 52.00 Bone Ash 14.00 Silica 12.00 Dolomite 8.00 EP Kaolin 6.10 Gerstley Borate 4.00 Lithium Carbonate 4.00 Total base recipe 100.10 Red Iron Oxide 10.00 Total Link to comment Share on other sites More sharing options...
Min Posted April 26, 2021 Report Share Posted April 26, 2021 Silica and alumina levels for cone 6 tend to be lower than the cone 10 range. Instead of fiddling that recipe I'ld suggest using a cone 10 like this one from William Shran. If you want to stick with using dolomite (to supply the magnesium) I redid the recipe using dolomite (instead of talc). Note that the original recipe included the iron oxide to add up to 100.10, I kept it that way. (just round the numbers off to the tenth decimal if you try my dolomite version of it) edit: I'm going to slightly edit your title so others will feel free to chime in here too. Link to comment Share on other sites More sharing options...
neilestrick Posted April 27, 2021 Report Share Posted April 27, 2021 I agree. There are a lot of good cone 10 iron reds out there, so it would be easier to just go straight to one of those. I can post a couple recipes if you want. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted April 27, 2021 Report Share Posted April 27, 2021 I’ve got a cone ten Ohata Khaki too. Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 1 hour ago, neilestrick said: I agree. There are a lot of good cone 10 iron reds out there, so it would be easier to just go straight to one of those. I can post a couple recipes if you want. Thank you Neil, I would appreciate the recipes. My former recipe had a lot of bone ash and more iron. I still have about a pint of it. I was thinking of sending it to Tony Hansen to analyze. Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 2 hours ago, Min said: Silica and alumina levels for cone 6 tend to be lower than the cone 10 range. Instead of fiddling that recipe I'ld suggest using a cone 10 like this one from William Shran. If you want to stick with using dolomite (to supply the magnesium) I redid the recipe using dolomite (instead of talc). Note that the original recipe included the iron oxide to add up to 100.10, I kept it that way. (just round the numbers off to the tenth decimal if you try my dolomite version of it) edit: I'm going to slightly edit your title so others will feel free to chime in here too. Thank you very much Min. The one of the right seems close. But I remember there being more bone ash....I still have some of the glaze....it's very gritty...and more iron.....it is very saturated red. I will try both of these. The reason I liked that cone 6 glaze was because it has nice gold micro-crystals in it. It looked exactly like the old recipe minus the LiCO3 and gerstley borate. Thank you for getting back to me...much appreciated. I am right on the brink of firing my gas kiln....it's been a project. Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 I saw that cone 10 R recipe on glazy....thanks for verifying it. I have not had good experiences with glazy recipes. I was able to track down all my other glazes.....a person who was going to school just as I was quitting and Kingman was going away had all of them except this one. I was lucky! Link to comment Share on other sites More sharing options...
Bill Kielb Posted April 27, 2021 Report Share Posted April 27, 2021 32 minutes ago, MFP said: I saw that cone 10 R recipe on glazy....thanks for verifying it. I have not had good experiences with glazy recipes. Here is one by Derek Au, - really good glaze guy. Anyway, recipes with Glazy admin on them tend to be more credibly tested. As I said Derek has an excellent reputation so if you like the look, it is cone 6 oxidation. Maybe something to try and color to taste. https://glazy.org/recipes/26248 Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 You have to use special talc with this recipe that has been calcined? Link to comment Share on other sites More sharing options...
Bill Kielb Posted April 27, 2021 Report Share Posted April 27, 2021 10 minutes ago, MFP said: You have to use special talc with this recipe that has been calcined? Click on the talc and alternatives show up. Just scanning them, doesn’t seem to be much difference actually. I see no reference to calcined so no, don’t think so. https://glazy.org/materials/15608 Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted April 27, 2021 Report Share Posted April 27, 2021 This one is from... a few years ago in the Alberta University of the Arts shop. Ohata Kaki 44 Potash feldspar 19.5 Silica 6.5 Whiting 9 Bone Ash 6 Talc 6 Kaolin 10 Red Iron oxide Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 Thank you! Link to comment Share on other sites More sharing options...
MFP Posted April 27, 2021 Author Report Share Posted April 27, 2021 Thanks Bill...almost have my gas kiln ready to go. Now I have to throw things to fill it up! Link to comment Share on other sites More sharing options...
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