Anders Posted June 4, 2014 Report Share Posted June 4, 2014 I'm looking for af simple recipe for a runny glaze. In fact what is some of the main engridients, that makes a glaze run at cone 8? Link to comment Share on other sites More sharing options...
neilestrick Posted June 4, 2014 Report Share Posted June 4, 2014 Most cone 6 glazes will run at cone 8, possibly too much. It's the fluxes (melting agents) in a glaze that make it melt, such as calcium, sodium, zinc, potassium and magnesium. An excess of flux and the glaze starts to run. Why cone 8? Link to comment Share on other sites More sharing options...
Anders Posted June 4, 2014 Author Report Share Posted June 4, 2014 I'm a bit of a greenhorn when it comes to composing glazes, and it is a public Electric kiln i'm using. The kiln is programed to fire at 1260 c0 , and i can't change that. But it would be nice to have a White runny glaze that was easy to make. And could be used with other colored glazes, to get that nice runny effect. Link to comment Share on other sites More sharing options...
neilestrick Posted June 4, 2014 Report Share Posted June 4, 2014 Cone 8 is a bit of an oddball temperature. Most glazes you'll find are for cone 5/6 or cone 9/10. I've attached a recipe for a simple cone 8 clear. You'll have to test it, of course, but it should work. If it's not runny enough increase the Dolomite or Frit. White.pdf White.pdf Link to comment Share on other sites More sharing options...
Guest JBaymore Posted June 4, 2014 Report Share Posted June 4, 2014 Anders, Remember that cones and end point temperature are not the same thing. I can go to 1260 C in 10 minutes... and I can get there in 10 hours and I can get there in 10 days. In each case the impacts on the clay body and glazes will be different. If the kiln is fired the exact same rate to 1260 C ervery time.... then the clay and glaze will be pretty much the same each firing (same end point cone heat-work). But if the kiln takes 8 hours one time,..... and 12 hours another time due to differences in the loading or whatever.... expect different results. best, ................john Link to comment Share on other sites More sharing options...
Anders Posted June 4, 2014 Author Report Share Posted June 4, 2014 Thank's for the replye's Link to comment Share on other sites More sharing options...
Stellaria Posted June 4, 2014 Report Share Posted June 4, 2014 You may wish to look into ash or fake ash glazes. I just tested out one called Diana's Fake Ash that, when used on white clay, glazes an off-white with beige-to-gray runnels. It's very pretty. I'm having a hard time picturing white and runny, because white is so static a color. You're basically looking for something that will lighten up other glaze colors and cause them to move? Link to comment Share on other sites More sharing options...
Guest JBaymore Posted June 4, 2014 Report Share Posted June 4, 2014 The peresence of alumina (Al2O3) in the glaze is what prevents it from running at any given cone. If you have a glaze you like, adjust the # of mols of alumina in the glaze down and even below typical limits, and it will start running. (Use glaze calc software to do this.) The 'fast and dirty' imprecise way to approch this is to look in the glaze recipe for the clay content....and keep dropping this in test amounts til it runs. Clay is a prime source of alumina in the glaze. best, .................john Link to comment Share on other sites More sharing options...
oldlady Posted June 5, 2014 Report Share Posted June 5, 2014 I am intrigued by your request. most public kiln owners would be horrified to find that someone deliberately put a runny glaze on a pot and it ran all over their shelf. what is your purpose in using such a glaze? Link to comment Share on other sites More sharing options...
neilestrick Posted June 5, 2014 Report Share Posted June 5, 2014 I am intrigued by your request. most public kiln owners would be horrified to find that someone deliberately put a runny glaze on a pot and it ran all over their shelf. what is your purpose in using such a glaze? Many of the glazes I mix for my students to use are runny. But I train them on how to use them so as to avoid ruining my shelves. Yes, I do have a few that stick in every firing, but most aren't very bad and clean up easily. And once they see how it can ruin their pots if they stick to the shelves, they are much more careful in the future. Runny glazes make for very interesting surfaces. Link to comment Share on other sites More sharing options...
Anders Posted June 6, 2014 Author Report Share Posted June 6, 2014 Of course it's not disireble have glaze all over the shelf's, but every one are asked to put their pot's on a plaque of clay. Runny glaze's can make some spectacular patterns. Link to comment Share on other sites More sharing options...
Darcy Kane Posted June 7, 2014 Report Share Posted June 7, 2014 Runny glazes are fun when they do what we want them to do, not so much when the end up looking like snot. Another experimental option is to glaze the piece and dip the rim in sieved wood stove ash. I keep a bucket for times when I feel like living on the edge. Link to comment Share on other sites More sharing options...
ashraf elhamy Posted June 7, 2014 Report Share Posted June 7, 2014 Cone 8 , that's alot As for running maybe alot of flux or little silica You can try also balance your recipe with segar formula to avoid the running Link to comment Share on other sites More sharing options...
Achilles Posted April 3, 2019 Report Share Posted April 3, 2019 On 6/5/2014 at 11:04 AM, neilestrick said: Many of the glazes I mix for my students to use are runny. But I train them on how to use them so as to avoid ruining my shelves. Yes, I do have a few that stick in every firing, but most aren't very bad and clean up easily. And once they see how it can ruin their pots if they stick to the shelves, they are much more careful in the future. Runny glazes make for very interesting surfaces. That's a beautiful glaze combination. Would you mind telling us how you glazed this piece? Is that the same white glaze you included in your post above? Sorry to resurrect an old thread. But I found this while searching for runny glazes, and it was just too lovely not to ask. Link to comment Share on other sites More sharing options...
neilestrick Posted April 4, 2019 Report Share Posted April 4, 2019 6 hours ago, Achilles said: That's a beautiful glaze combination. Would you mind telling us how you glazed this piece? Is that the same white glaze you included in your post above? Sorry to resurrect an old thread. But I found this while searching for runny glazes, and it was just too lovely not to ask. Thank you for the kind words! That pot has 3 glazes on it- a glossy tea colored glaze dipped first, then a pour of the white included above, and then big spots of a 3rd glaze brushed on. Link to comment Share on other sites More sharing options...
Achilles Posted April 4, 2019 Report Share Posted April 4, 2019 Thanks for the explanation. This reminds me that the way glazes are combined and applied is just as important as the glazes themselves . The effect is stunning. Link to comment Share on other sites More sharing options...
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