hershey8 Posted August 27, 2015 Report Share Posted August 27, 2015 I mixed up a small batch of Tony Hansen 20X5 ^6 glaze, and sprayed it on my bisqued ware. wollastonite 20 frit 3134 20 kaolin 20 silica 20 custer feld 20 3% copper carbonate 3% rutile I expected to see a litter of green bowls when I opened the kiln lid. Instead, I was surprised to see that they were all a lovely mottled, medium blue. One of the clay bodies used was red, one tannish, and one red with some white slip in places. The white slip now appears to be pale green, but everything else is that wonderful blue. Do you suppose, as I run headlong into the world of geezerdom, that I accidentally threw a little cobalt carb into the mix, or does copper and rutile just sometimes yield blue? john Link to comment Share on other sites More sharing options...
TJR Posted August 27, 2015 Report Share Posted August 27, 2015 Pictures? TJR. Edit copper can go blue.It's a good combo-let's see it. you might still be a geezer,though. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted August 27, 2015 Report Share Posted August 27, 2015 This is just spitballing, but... Given that one of the main ingredients to a cone 6 floating blue is an iron bearing clay (Alberta slip) plus some frit and rutile, perhaps it's a reaction between the tan and red (iron bearing) clays and the glaze. Especially since the white slip is showing green. Link to comment Share on other sites More sharing options...
TJR Posted August 27, 2015 Report Share Posted August 27, 2015 This is just spitballing, but... Given that one of the main ingredients to a cone 6 floating blue is an iron bearing clay (Alberta slip) plus some frit and rutile, perhaps it's a reaction between the tan and red (iron bearing) clays and the glaze. Especially since the white slip is showing green. I don't know about the iron. I don't think so-it will just make it dark. I am looking at the wollastinite fluxing the copper. TJR. Link to comment Share on other sites More sharing options...
rayaldridge Posted August 28, 2015 Report Share Posted August 28, 2015 I have a glaze with a lot of titanium (not from rutile) that will go blue over an iron-heavy slip, but stay white over porcelain. Link to comment Share on other sites More sharing options...
hershey8 Posted August 29, 2015 Author Report Share Posted August 29, 2015 I have a glaze with a lot of titanium (not from rutile) that will go blue over an iron-heavy slip, but stay white over porcelain. Does it have any cobalt or copper? j Link to comment Share on other sites More sharing options...
hershey8 Posted August 29, 2015 Author Report Share Posted August 29, 2015 Pictures? TJR. Edit copper can go blue.It's a good combo-let's see it. you might still be a geezer,though. Well, it sho is pretty! Having trouble getting my old nikon L3 to make nice with my computer. Sorry about lack of pix. Link to comment Share on other sites More sharing options...
hershey8 Posted August 29, 2015 Author Report Share Posted August 29, 2015 This is just spitballing, but... Given that one of the main ingredients to a cone 6 floating blue is an iron bearing clay (Alberta slip) plus some frit and rutile, perhaps it's a reaction between the tan and red (iron bearing) clays and the glaze. Especially since the white slip is showing green. I will run some test tiles later. That should be telling. It was a pleasant surprise that I hope I can duplicate. Link to comment Share on other sites More sharing options...
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