Pam S Posted February 11, 2011 Report Share Posted February 11, 2011 Is there such a creature as a cone 6 oxidation Oil Spot glaze? Every one I have foun is high fire reduction. Link to comment Share on other sites More sharing options...
Denice Posted February 11, 2011 Report Share Posted February 11, 2011 Is there such a creature as a cone 6 oxidation Oil Spot glaze? Every one I have foun is high fire reduction. Pam I found this recipe in my files I started collecting Cone 6 recipes in the early 70's after reading Richard Zakin's first book on glazes. I have never tested this glaze but here it is. Denice ( Wichita, KS) Cone 6 Brown Spot Oil Glaze Frit 3134 46 EPK 36 Silica 18 Cobalt 3 Rutile 5 Melts well, guard against glazing heavily near the base. Link to comment Share on other sites More sharing options...
Pam S Posted February 11, 2011 Author Report Share Posted February 11, 2011 Thanks! Which cobalt ox or carb? Link to comment Share on other sites More sharing options...
Denice Posted February 11, 2011 Report Share Posted February 11, 2011 Thanks! Which cobalt ox or carb? Pam I wondered that myself if you have cobalt oxide I'd try that first, this formula didn't have much info with it. I don"t know how you get a Oil Spot glaze in a oxidizing atmosphere, give it a try and let everyone know how it came out. Denice Link to comment Share on other sites More sharing options...
Pres Posted February 13, 2011 Report Share Posted February 13, 2011 Is there such a creature as a cone 6 oxidation Oil Spot glaze? Every one I have foun is high fire reduction. Minnesota clay, or ART used to carry an Oil Spot black that was very much oil spotty at cone 6. Would go from a shiny black to brown, to black with varying degrees of gloss. so there has to be some formulas out there for it. Link to comment Share on other sites More sharing options...
bciskepottery Posted February 14, 2011 Report Share Posted February 14, 2011 I found this from a handout from a John Britt glaze workshop: Cone 6 Oil Spots Candace Black Cone 6 65 g. NC-4 feldspar (soda feldspar) 20 g. Silica 5 g. Whiting 5 g. EPK 5 g. Dolomite 5 g. Ferro Frit 3110 8% Red Iron Oxide 2% Cobalt Carbonate The base glaze totals to 105 g. so I am guessing this was the recipe for a test batch. I also think John took the Cone 10 Candace Black Oil Spot and altered it for Cone 6 by adding 5 g. Frit 3110. In looking at the various Cone10 Oil Spot recipes in his book, those that use Cobalt all use Cobalt Carbonate, not Cobalt Oxide. I've not used this recipe so I can't speak to its performance. And, it is fired in oxidation. Link to comment Share on other sites More sharing options...
John Britt Posted February 21, 2011 Report Share Posted February 21, 2011 Oil Spot Combo #1Cone 6 (two to three coats- pretty thick) 47.83 g.- G-200 23.91g. - Silica 17.39 g. – Whiting 10.87 g. – EPK 9.78 g – Red Iron Oxide Oil Spot Combo #2 CoverGlaze (apply over #1) Cone 6 (1 - 2 coats) 30g. –Custer Feldspar 30g. – Gerstley Borate 25g.- Silica 5g. – EPK 10g. Zircopax. (can be substituted for mason stains.) I found this from a handout from a John Britt glaze workshop: Cone 6 Oil Spots Candace Black Cone 6 65 g. NC-4 feldspar (soda feldspar) 20 g. Silica 5 g. Whiting 5 g. EPK 5 g. Dolomite 5 g. Ferro Frit 3110 8% Red Iron Oxide 2% Cobalt Carbonate The base glaze totals to 105 g. so I am guessing this was the recipe for a test batch. I also think John took the Cone 10 Candace Black Oil Spot and altered it for Cone 6 by adding 5 g. Frit 3110. In looking at the various Cone10 Oil Spot recipes in his book, those that use Cobalt all use Cobalt Carbonate, not Cobalt Oxide. I've not used this recipe so I can't speak to its performance. And, it is fired in oxidation. Link to comment Share on other sites More sharing options...
Pam S Posted February 22, 2011 Author Report Share Posted February 22, 2011 Thanks John. Are you spraying, brushing or dipping? Link to comment Share on other sites More sharing options...
pent19 Posted February 23, 2011 Report Share Posted February 23, 2011 amaco carries an oil spot glaze (PC-35) I have it but haven't used it much. Link to comment Share on other sites More sharing options...
SShirley Posted February 25, 2011 Report Share Posted February 25, 2011 John, I tried your oil spot combo and love the results. I'm not sure if this is what it's supposed to look like but I like it all the same. The first one is brushed on (medium thick) and the second one is dipped (really thick). Thanks for the recipes. Sylvia Oil Spot Combo #1Cone 6 (two to three coats- pretty thick) 47.83 g.- G-200 23.91g. - Silica 17.39 g. – Whiting 10.87 g. – EPK 9.78 g – Red Iron Oxide Oil Spot Combo #2 CoverGlaze (apply over #1) Cone 6 (1 - 2 coats) 30g. –Custer Feldspar 30g. – Gerstley Borate 25g.- Silica 5g. – EPK 10g. Zircopax. (can be substituted for mason stains.) I found this from a handout from a John Britt glaze workshop: Cone 6 Oil Spots Candace Black Cone 6 65 g. NC-4 feldspar (soda feldspar) 20 g. Silica 5 g. Whiting 5 g. EPK 5 g. Dolomite 5 g. Ferro Frit 3110 8% Red Iron Oxide 2% Cobalt Carbonate The base glaze totals to 105 g. so I am guessing this was the recipe for a test batch. I also think John took the Cone 10 Candace Black Oil Spot and altered it for Cone 6 by adding 5 g. Frit 3110. In looking at the various Cone10 Oil Spot recipes in his book, those that use Cobalt all use Cobalt Carbonate, not Cobalt Oxide. I've not used this recipe so I can't speak to its performance. And, it is fired in oxidation. Link to comment Share on other sites More sharing options...
Pam S Posted February 25, 2011 Author Report Share Posted February 25, 2011 Sylvia, I like the results. Especially the first piece. However that isn't the result I'm looking for with oil spot. Take a look at John's website. His oil spot pieces are to die for. Link to comment Share on other sites More sharing options...
SShirley Posted February 25, 2011 Report Share Posted February 25, 2011 Yes, his results are very different. Possibly different clay and/or firing schedule. Sylvia Sylvia, I like the results. Especially the first piece. However that isn't the result I'm looking for with oil spot. Take a look at John's website. His oil spot pieces are to die for. Link to comment Share on other sites More sharing options...
JLowes Posted August 10, 2011 Report Share Posted August 10, 2011 amaco carries an oil spot glaze (PC-35) I have it but haven't used it much. I have used this several times and I never got anything from it resembling an oil spot. It pools nicely in texture and looks like used motor oil, so maybe that's what Amaco saw a resemblance to when naming the glaze. It's not a bad glaze, just not what an oil spot should look like. John Britt's oil spot combo comes wa-a-a-a-y closer. John Link to comment Share on other sites More sharing options...
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