Krayart Posted December 15, 2016 Report Share Posted December 15, 2016 I am trying to make wadding for building up my kiln shelves. I have an electric kiln and normally I would use 50 parts EPK and 50 parts Ball Clay and mix with water till it is a dough and put it between my furniture and my Kiln shelf to act like a glue as I am building up my shelves to make them sturdy. I do not have anymore EPK but I do have a big bag of Kaolinitic Clay (not sure exactly what that is but I do know that Kaolin is in EPK) in powder form and I also have OM4 Ball Clay and some Alumina. Can I mix 50 parts Kaolinitic Clay and 50 parts OM4 Ball Clay and maybe throw in a little alumina to make a wadding for my shelving process? I dont want to use much alumina since it is so expensive. Any advice would be much appreciated Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 15, 2016 Report Share Posted December 15, 2016 Answered in the other thread. best, .............john Link to comment Share on other sites More sharing options...
Mark C. Posted December 15, 2016 Report Share Posted December 15, 2016 EPK and alumina 50% 50% if I recall Whatever John has posted is what you need to do-just search his posts Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 15, 2016 Report Share Posted December 15, 2016 http://community.ceramicartsdaily.org/topic/14064-simple-wadding-for-supporting-pots-in-electric-kiln-glaze-firing/?p=118469 Link to comment Share on other sites More sharing options...
Mark C. Posted December 15, 2016 Report Share Posted December 15, 2016 Not sure why in a small electric you would ever need to do this?Are your posts uneven or have non flat ends? Link to comment Share on other sites More sharing options...
neilestrick Posted December 15, 2016 Report Share Posted December 15, 2016 You should only every use 3 posts per shelf, so even with messed up post ends the shelf shouldn't rock. Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted December 15, 2016 Report Share Posted December 15, 2016 Never seen the wadding with shelves before, does anybody have a picture? Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 16, 2016 Report Share Posted December 16, 2016 Never seen the wadding with shelves before, does anybody have a picture? Example in an anagama here: best, .................john Link to comment Share on other sites More sharing options...
What? Posted December 16, 2016 Report Share Posted December 16, 2016 $2.50- $3.00 a pound for alumina hydrate. A few pounds goes a long way when mixed 50/50 with EPK. If the post are that bad get new ones if your firing tons of work then it should be a drop in the bucket. Link to comment Share on other sites More sharing options...
High Bridge Pottery Posted December 16, 2016 Report Share Posted December 16, 2016 Thank you John. Pretty much how I expected it to look but always good to have a photo. Link to comment Share on other sites More sharing options...
Krayart Posted December 16, 2016 Author Report Share Posted December 16, 2016 Thank you all for your responses! I am an apprentice and this is how my boss is teaching me to do it in her kiln. I didnt think that you needed to put wadding in between either but thats just how she wants me to do it. Link to comment Share on other sites More sharing options...
Mark C. Posted December 16, 2016 Report Share Posted December 16, 2016 Hey I just ordered 50# bag of the stuff-its cheaper that way. Link to comment Share on other sites More sharing options...
Guest JBaymore Posted December 16, 2016 Report Share Posted December 16, 2016 Hey I just ordered 50# bag of the stuff-its cheaper that way. There are very few things that I don't buy in 50 pound bags. (Yes... cobalt carbonate and tin oxide are two of them. ) FYI....... for the college's anagama, which is a heavy ash deposit environment, we go thru about 125 pounds of wet wadding mixture. That's for a pretty large kiln, and every pot and every post is waddded. Overall ... it is minor expense relative to the value of the work in the kiln. best, .......................john Link to comment Share on other sites More sharing options...
neilestrick Posted December 16, 2016 Report Share Posted December 16, 2016 Way back when I wood fired, we used wadding made of equal parts fireclay, 20 mesh silica sand, and flour. After the firing it just crumbled away, or if it got ash in it it was pretty easy to grind. And the kiln smelled like toast in the first few hundred degrees. Link to comment Share on other sites More sharing options...
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