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| Tips, Techniques, and Questions -- Technical questions or tips |
2013-06-14, 11:15am
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Senior Member
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Join Date: Dec 11, 2012
Location: Orlando, fl
Posts: 104
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kiln wash
I have a new kiln and wondering how many coats of kiln wash to apply
thanks
maria
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2013-06-14, 11:26am
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Growing Edge Glass
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Join Date: Jul 05, 2008
Posts: 2,539
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Hi Maria...congrats on the new kiln!
If the kiln is made with firebrick I coat the floor of the kiln only with a kiln wash for protection....say in the event something rolled off a shelf onto the floor of the kiln while firing. I usually do about 4 coats of wash on the floor.
I then coat my kiln shelves with 2-4 coats. It all depends on how thick your wash is really. What I do is coat the shelves, allowing them to dry in between. Once I have 3 coats on and they have dried, i will brush my hand over the kiln shelf and if i have a light powder on my hands then I don't do a fourth coat.
Everyone probably does it their own way, that's just how I've always treated my kilns and shelves.
Hope that helps and I'm sure others will chime in.
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2013-06-14, 2:25pm
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Alaska Boro
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Join Date: Dec 10, 2009
Location: Anchorage, Alaska
Posts: 1,065
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Another option is to use a ceramic fiber blanket on the bottom Using one on this end and it works well.
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2013-06-15, 3:43am
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Senior Member
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Join Date: Aug 02, 2007
Location: Nahant Ma
Posts: 1,901
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I agree with kiln wash on the floor, I do it a couple of times a year. As for shelves I put three coats on going in different direction, I don't let them dry between coats. Let them sit overnight.
Bob
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2013-06-15, 5:31am
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SCIENCE Teacher!
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Join Date: Jul 19, 2005
Location: Wylie, TX
Posts: 2,140
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I have an Arrow Springs AF99. I don't use any kiln wash.
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2013-06-15, 2:31pm
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Slogan Challenged...
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Join Date: Mar 21, 2009
Location: Maricopa, Arizona
Posts: 6,286
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Like the others, I put a couple of coats on the floor. I also did two coats for the sides. My kiln wash was a little on the thick side for the second coat, the first one was thinner and could soak into the brick a little for a nice seal. I fire with a ceramic blanket covering the kiln floor (batch anneal) so I don't use shelves but wanted to protect the sides of the kiln in case of an accident or overfiring.
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2013-06-15, 3:19pm
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Senior Member
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Join Date: Apr 08, 2011
Location: NC
Posts: 1,687
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Not really a good idea to kiln wash the sides. If you got any wash on the elements, they could be toast.
If you're concerned about batch annealing in a side element kiln, use an unfired ceramic bowl (or make one from potter's clay to fit the interior dimensions) filled with your beads.
It's also better to use a shelf on some small risers - the heat is more even that way - or you could simply elevate the bowl off the floor.
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Barbara
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2013-06-15, 4:46pm
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Location: NC
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Kristen, pm me the inside dimensions of your kiln. I have an extra "box" I can send you if it will fit - it's fugly, but it works great for batch annealing.
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Barbara
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2013-06-27, 8:30am
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Slogan Challenged...
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Join Date: Mar 21, 2009
Location: Maricopa, Arizona
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I just got it last night, Barbara. That was very nice of you! My DH was impressed with my LE friends. Now, maybe I can stop itching myself to death using the ceramic blanket, for the kiln at least.
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