MarkS Posted February 6, 2011 Report Share Posted February 6, 2011 Looking for a turquoise satin (or semi-gloss) glaze recipe. Something about the color of the stone. I'm thinking I need about 2% copper carbonate but I'm not sure about the base recipe. Thanks! Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 6, 2011 Report Share Posted February 6, 2011 If you mention what temperature and atmosphere, you stand a better chance of getting some responses. Marcia Link to comment Share on other sites More sharing options...
MarkS Posted February 6, 2011 Author Report Share Posted February 6, 2011 I guess that would help! Cone 6 OX Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 7, 2011 Report Share Posted February 7, 2011 Pete Pinnell's Weathered Bronze: PINNELL STRONTIUM MATT ^6 OX Lithium Carb. 1.0 Strontium Carb. 20.0 Neph Sy. 60.0 Ball 10.0 Flint 9.0 WEATHERED BRONZE:Titanium Diox. 5.0, Copper Carb. 5.0 Here is one I use regularly: Recipe Name: Turquoise Mat Cone: 6 Color: Firing: Oxidation Surface: Matte Amount Ingredient 51.5 Nepheline Syenite 20.9 Strontium Carbonate 7.7 Silica 6.6 Ball Clay--Old Mine #4 3.3 Lithium Carbonate 90 Total Additives 3.5 Copper Carbonate 4 Bentonite 1 Epsom Salts Unity Oxide .146 Li2O .271 Na2O .086 K2O .006 MgO .022 CaO .469 SrO 1.000 Total .45 Al2O3 .002 Fe2O3 2.347 SiO2 .003 TiO2 5.2 Ratio 8.9 Exp This one I shared with Alisa Claussen who does lots of glaze testing. She added the empirical formula and converted it to Strontium from Barium Carbonate. Marcia Link to comment Share on other sites More sharing options...
Laura A Strike Posted February 7, 2011 Report Share Posted February 7, 2011 Looking for a turquoise satin (or semi-gloss) glaze recipe. Something about the color of the stone. I'm thinking I need about 2% copper carbonate but I'm not sure about the base recipe. Thanks! I agree with Marcia. Pete's weathered bronze is very nice. It also works in reduction. It will be more bronze if thin, especially on red clay. Link to comment Share on other sites More sharing options...
MarkS Posted February 8, 2011 Author Report Share Posted February 8, 2011 Marcia, Thanks for passing that along. I'm a relative newbie and the only thing I'm not following is the "Unity Oxide" or those other trace chemicals. Are they additives also? Thanks Again! Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 8, 2011 Report Share Posted February 8, 2011 Marcia, Thanks for passing that along. I'm a relative newbie and the only thing I'm not following is the "Unity Oxide" or those other trace chemicals. Are they additives also? Thanks Again! That is the chemical breakdown. for calculations. RO, R2O3 and RO2 radicals. When you get into calculations it will be more meaningful for you. Alisa always lists them with her tests.If you want to see a lot of glaze tests google Alisa Clausen or go to Clayart archives. Marcia Link to comment Share on other sites More sharing options...
MarkS Posted February 20, 2011 Author Report Share Posted February 20, 2011 Thanks for the info. Mixed some up and tried it this weekend. Photo attached. Love the color but not sure about the bumps. The inside of the pots are basically smooth and unblemished. Any thoughts? Fired to cone 6 over a period of about 11+ hours. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 21, 2011 Report Share Posted February 21, 2011 Thanks for the info. Mixed some up and tried it this weekend. Photo attached. Love the color but not sure about the bumps. The inside of the pots are basically smooth and unblemished. Any thoughts? Fired to cone 6 over a period of about 11+ hours. Can't explain the bumps either, but YUCK!! What clay are you using? Is this in Oxidation? what was the firing cycle? Did you soak at ^6? Marcia Link to comment Share on other sites More sharing options...
MarkS Posted February 21, 2011 Author Report Share Posted February 21, 2011 The clay was Highwater Brownstone fired to cone 6 oxidation. Other glazes did fine. Let the kiln shut off per the kiln sitter. No extra soak (Didn't want to out think myself). I'll have to start a separate discussion to see if anyone has some hints for my type kiln. Link to comment Share on other sites More sharing options...
Marcia Selsor Posted February 21, 2011 Report Share Posted February 21, 2011 I use the turquoise on porcelain. I have had it blister if over fired, but that looks different than your problem. Marcia Link to comment Share on other sites More sharing options...
MarkS Posted February 21, 2011 Author Report Share Posted February 21, 2011 It may have gotten too hot. You can see an area where it got burnt. The bumps are like blisters - you can scratch them off. In fact I could still hear the few pots I glazed this way still "pinging" this morning. Link to comment Share on other sites More sharing options...
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