Firing too long at lower cone a problem? - Electric Mid&Hi Fired Ceramics2024-03-28T12:11:37Zhttps://cone6pots.ning.com/forum/topics/firing-too-long-at-lower-cone-a-problem?commentId=2103784%3AComment%3A107796&x=1&feed=yes&xn_auth=noThese are from two separate f…tag:cone6pots.ning.com,2014-06-21:2103784:Comment:1077962014-06-21T20:25:00.191ZMeredith Walkerhttps://cone6pots.ning.com/profile/MeredithWalker
<p>These are from two separate firings - the blue spiral one went through the firing I described in my post. White clay, blue slip, white matte glaze. The green is Philly Green matte on Speckled Brownstone clay.</p>
<p>These are from two separate firings - the blue spiral one went through the firing I described in my post. White clay, blue slip, white matte glaze. The green is Philly Green matte on Speckled Brownstone clay.</p> Let's see some of your wares!tag:cone6pots.ning.com,2014-06-21:2103784:Comment:1077072014-06-21T13:38:13.364ZNadine Mercaderhttps://cone6pots.ning.com/profile/NadineMercader
Let's see some of your wares!
Let's see some of your wares! Happy to say that this firing…tag:cone6pots.ning.com,2014-06-16:2103784:Comment:1078582014-06-16T20:24:17.542ZMeredith Walkerhttps://cone6pots.ning.com/profile/MeredithWalker
<p>Happy to say that this firing went just fine! Everything turned out as I usually expect from a normal firing. I've also tested my elements for burnout (using paper strips). All look okay.</p>
<p>Happy to say that this firing went just fine! Everything turned out as I usually expect from a normal firing. I've also tested my elements for burnout (using paper strips). All look okay.</p> Thanks, Norm. I didn't intend…tag:cone6pots.ning.com,2014-06-12:2103784:Comment:1075492014-06-12T02:30:54.098ZMeredith Walkerhttps://cone6pots.ning.com/profile/MeredithWalker
<p>Thanks, Norm. I didn't intend to leave the bottom peep open - I just forgot to put it in. Won't do that again! Now I just have to patiently wait until I can see results tomorrow.</p>
<p>Thanks, Norm. I didn't intend to leave the bottom peep open - I just forgot to put it in. Won't do that again! Now I just have to patiently wait until I can see results tomorrow.</p> Leaving both peephole plugs o…tag:cone6pots.ning.com,2014-06-12:2103784:Comment:1072392014-06-12T01:14:21.130ZNorm Stuarthttps://cone6pots.ning.com/profile/NormStuart
<p>Leaving both peephole plugs open is costly in terms of electricity, but apart from that the firing time with both peepholes open probably didn't accomplish much. The real firing and heat-work didn't start to take place until you put one of the plugs back in.</p>
<p></p>
<p>We have a very over-powered kiln for its size, about 10 kW per cubic foot, and I doubt it could reach cone 1 with both peepholes open. If you look at your kiln when the temperature reaches 2,000 F you'll see a fairly…</p>
<p>Leaving both peephole plugs open is costly in terms of electricity, but apart from that the firing time with both peepholes open probably didn't accomplish much. The real firing and heat-work didn't start to take place until you put one of the plugs back in.</p>
<p></p>
<p>We have a very over-powered kiln for its size, about 10 kW per cubic foot, and I doubt it could reach cone 1 with both peepholes open. If you look at your kiln when the temperature reaches 2,000 F you'll see a fairly generous air gap between the lid and the kiln walls - and the soft firebrick is porous as well. The last thing a typical electric kiln needs is more ventilation.</p>
<p></p>
<p>A few years ago we had someone fire a cone 6 with both peephole plugs out of our older lower power kiln with a kiln sitter. Looking at the results, I don't think the kiln got much hotter than cone 04. The person handling that firing had become convinced that both peepholes had to be open for an oxidation firing, because he read that all of the "dampers" of a gas kiln had to be open. It took quite a while to convince him he was wrong.</p>
<p><br/> <br/> <cite>Meredith Walker said:</cite></p>
<blockquote cite="http://cone6pots.ning.com/forum/topics/firing-too-long-at-lower-cone-a-problem?commentId=2103784%3AComment%3A107514&xg_source=activity#2103784Comment107514"><div><p>Thanks, George. The kiln finally switched itself off around 4, I think, coincidentally just after I'd talked to our studio director here about the <span class="skimlinks-unlinked">problem.Maybe</span> I at least won't have nightmares tonight, thanks to your and his encouraging comments. I do wonder how the glazes will turn out - if something looks really interesting, I'll post it here.</p>
</div>
</blockquote> Thanks, George. The kiln fina…tag:cone6pots.ning.com,2014-06-11:2103784:Comment:1075142014-06-11T21:12:20.383ZMeredith Walkerhttps://cone6pots.ning.com/profile/MeredithWalker
<p>Thanks, George. The kiln finally switched itself off around 4, I think, coincidentally just after I'd talked to our studio director here about the problem.Maybe I at least won't have nightmares tonight, thanks to your and his encouraging comments. I do wonder how the glazes will turn out - if something looks really interesting, I'll post it here.</p>
<p>Thanks, George. The kiln finally switched itself off around 4, I think, coincidentally just after I'd talked to our studio director here about the problem.Maybe I at least won't have nightmares tonight, thanks to your and his encouraging comments. I do wonder how the glazes will turn out - if something looks really interesting, I'll post it here.</p> If you have a kiln sitter kee…tag:cone6pots.ning.com,2014-06-11:2103784:Comment:1075082014-06-11T20:24:21.869ZGeorge Lewterhttps://cone6pots.ning.com/profile/GeorgeLewter
<p>If you have a kiln sitter keep firing until it trips as it measures heat work. If not, fire until cone 6 goes down. You won't like a the outcome if you don't get past cone2.. Your long firing may improve your glazes </p>
<p>If you have a kiln sitter keep firing until it trips as it measures heat work. If not, fire until cone 6 goes down. You won't like a the outcome if you don't get past cone2.. Your long firing may improve your glazes </p>