PottaFella Posted May 16, 2017 Report Share Posted May 16, 2017 Going through my normal glaze frustrations - I added 3.5% titanium dioixde to a paleish grey glaze and it's gone yellowey/ochre colour. Why? I'd expected to get lovely blue/grey with titanium sparkles/slight crystal effect! Clay is a pure white stoneware fired at Orton cone 7 and a half. Recipe is... Soda Feldspar 70 Bentonite 3 Lith Carb 1 Dolomite 7 Zinc Ox 5 Quartz 12 Cobalt Ox .075 Chrome Ox .075 Nickel Ox .05 Titanium Dioxide 3.5 The rim (which has gone bluey) was dipped again in same glaze + 10% Gillespie Borate. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted May 16, 2017 Report Share Posted May 16, 2017 Titanium does indeed turn yellow, and at those percentages, it's the dominant colourant in your glaze. I'm not surprised it's overwhelmed everything else.The bluey rim looks like boron clouding. I know it's not what you were going for, but it is quite pretty. Link to comment Share on other sites More sharing options...
neilestrick Posted May 16, 2017 Report Share Posted May 16, 2017 Yep. I've got several recipes for titanium yellows and oranges. Link to comment Share on other sites More sharing options...
Pres Posted May 16, 2017 Report Share Posted May 16, 2017 For bluish, I would have tried replacing the titanium with zirconium, of 50/50 zirconium and tin. Yet you may not want to use the tin, as you are including chrome in you glaze. Could cause pink flashing. best, Pres Link to comment Share on other sites More sharing options...
Dick White Posted May 16, 2017 Report Share Posted May 16, 2017 Titanium and nickel are known for uncooperative play in the sandbox. Increase the nickel a bit and it will turn full-on stinky (you know what I mean) brown. Agree with Diesel about boron clouding causing the blue tint on the rim. Link to comment Share on other sites More sharing options...
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