Mudfish1 Posted May 27 Report Share Posted May 27 Hi Folks! Does anyone have experience with the glazes in Tichane's "Celedon Blues" book? I am working with his 5-3-2 recipe (50% feldspar, 30% silica, 20% whiting), which settles out and pancakes rather spectacularly. Does anyone have advice about additives that won't mess up the final blue celedon color? I am going to try 1% bentonite in my next batch to keep it from settling, but wanted to see if anyone has advice before I start wasting time in reduction firings just to see how it looks (yes, being lazy). Thanks for ideas! Richard Quote Link to comment Share on other sites More sharing options...
Kelly in AK Posted May 28 Report Share Posted May 28 Definitely use bentonite and then flocculate it with Epsom salts, that should help the suspension issues. There’s no clay in this recipe, maybe 2% bentonite. I believe Veegum fires cleaner than bentonite and has equal or better suspension properties. Hulk and Rae Reich 2 Quote Link to comment Share on other sites More sharing options...
PeterH Posted May 28 Report Share Posted May 28 10 hours ago, Mudfish1 said: Hi Folks! Does anyone have experience with the glazes in Tichane's "Celedon Blues" book? I am working with his 5-3-2 recipe (50% feldspar, 30% silica, 20% whiting), which settles out and pancakes rather spectacularly. Does anyone have advice about additives that won't mess up the final blue celedon color? From a position of complete ignorance ... you might be interested in looking at the approach used in 5321.1 https://www.derekau.net/blog/2015/01/19/blue-celadon-glazes Celadon Blues ... The “532.1” formula contains 50 parts feldspar, 30 parts silica, 20 parts limestone, and 1 part iron oxide. The “5321.1” formula is the same but adds 10 parts kaolin. The type of kaolin added greatly affects the color of the glaze, for blue celadons a kaolin very low in titania such as Grolleg or New Zealand Halloysite is required. https://digitalfire.com/material/kaolin Kaolins are employed in glaze recipes to keep the silica, feldspar, frit and other particles from settling out (the surface chemistry of the particles and their interaction with water are responsible for this behavior). At the same time the oxide chemistry of kaolin makes it the primary source of alumina oxide for glazes. Hulk and Rae Reich 2 Quote Link to comment Share on other sites More sharing options...
Callie Beller Diesel Posted May 29 Report Share Posted May 29 Double check any clay or feldspar source for trace titanium. This includes in the clay body. Celadons are very sensititive to the clay they’re applied over. Part of it is the translucency, part of it is the chemistry. PeterH 1 Quote Link to comment Share on other sites More sharing options...
Shane Posted May 30 Report Share Posted May 30 Each to their own of course but I would recommend you also try out the Pinnell Blue Celadon. I did some small scale tests and a few pieces in both and in my experience the Pinnell is a much nicer glaze and easier to work with. Shane Quote Link to comment Share on other sites More sharing options...
Mudfish1 Posted May 30 Author Report Share Posted May 30 Hey thank you for the very useful advice! I will check the titania content of my clays and then use that to reduce settling. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.