tomhumf Posted January 31, 2020 Report Share Posted January 31, 2020 I've been using a glaze with 7% titanium dioxide as an opacifier over speckled stoneware. It's very white when fired in oxidation conditions but goes more tan / grey in reduction. I like the look of the clay in reduction and I seem to get less pinholes for some reason in my small kiln. So I'd like to change the opacifier, going to try zirc silicate and tin. I just wondered if anyone knows which ones ( if any ) will produce a very white glaze even in heavy reduction? Thanks Link to comment Share on other sites More sharing options...
liambesaw Posted January 31, 2020 Report Share Posted January 31, 2020 19 minutes ago, tomhumf said: I've been using a glaze with 7% titanium dioxide as an opacifier over speckled stoneware. It's very white when fired in oxidation conditions but goes more tan / grey in reduction. I like the look of the clay in reduction and I seem to get less pinholes for some reason in my small kiln. So I'd like to change the opacifier, going to try zirc silicate and tin. I just wondered if anyone knows which ones ( if any ) will produce a very white glaze even in heavy reduction? Thanks Zirconium will produce a very white white, tin will be more of a softer more natural looking white Link to comment Share on other sites More sharing options...
tomhumf Posted January 31, 2020 Author Report Share Posted January 31, 2020 49 minutes ago, liambesaw said: Zirconium will produce a very white white, tin will be more of a softer more natural looking white Oh thanks, I just look at the digital fire page for zirconium though and it has a comparison with tin. Looks like tin doesn't stay white in reduction so I'll probably not try that one. Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted February 1, 2020 Report Share Posted February 1, 2020 Tin tends to offer a white with more visual depth. It’s influenced a lot by the clay it’s over top, and can react with other metals. Zircopax by itself is very flat, toilet bowl white. Titanium is a variegator that can go white under the right circumstances, but can also swing grey/blue especially around iron, or yellow at high concentrations. You can get some really soft visual effects when you mix any or all of them. If you’re that kid like me who can see all the different shades of white, it’s interesting to do triaxial blends with the three of them. Link to comment Share on other sites More sharing options...
liambesaw Posted February 1, 2020 Report Share Posted February 1, 2020 Tin is also like 10x the price of the others. I only use it for glaze recipes that have iron or chrome that require it for specific effect. As much as I love that buttery tin look, I can't justify the price Link to comment Share on other sites More sharing options...
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