jennyd Posted November 24, 2014 Report Share Posted November 24, 2014 A lovely blue glaze that breaks to a golden brown that our community studio loves. Needs to be applied rather thick but is also a runner so careful application is necessary. The last batch that was mixed turned out to be a transparent honey brown and we are calling caramel for lack of a better word. Re-tested - same results. Re-tested again using the 3 frits that we store in large containers thinking maybe the wrong frit was used - same results. We are stumped. The Alberta Slip is from a bag we have had for some time. The rutile may be from a new bag. Any suggestions. Thanks so much for your help. I am not a glaze specialist - give me a recipe and I am good. 80% Alberta Slip 20% 3134 Frit 5% Rutile Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted November 24, 2014 Report Share Posted November 24, 2014 Are you sure that is the right recipe? I would have thought blue meant some kind of cobalt was in there. Link to comment Share on other sites More sharing options...
Min Posted November 24, 2014 Report Share Posted November 24, 2014 This is similar to Steve Slatin's Gnu Blue and the Alberta Slip Rutile Blue from Digitalfire. Pretty sure you can put the colour change down to your rutile if your clay, application method and firing schedule haven't changed. From Digitalfire: http://digitalfire.com/4sight/recipes/alberta_slip_rutile_blue_cone_6_31.html?logout=yes Hansen says you can restore the blue colour by adding 0 point 25 cobalt ox. if you don't do the slow cool this glaze prefers. If you have titanium dioxide you could try a test of that plus some iron to sub for the rutile. It's not going to be exact since rutile has other "dirty" ingredients in it but it might get you close. So for the 5 rutile in your recipe you would try titanium diox 4.5 and iron ox 0.5 Link to comment Share on other sites More sharing options...
Biglou13 Posted November 24, 2014 Report Share Posted November 24, 2014 I have found the glaze finicky cobalt or not. Even with slow cool I've had Inconsistent results. Quite beautiful when it worked which turned out the minority of the time. Tom Hansen from digital fire and plainsman participate at some on line forums you should ask him direct... Or email alberta. Link to comment Share on other sites More sharing options...
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