gczop
Full Member
Posts: 202
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Post by gczop on Nov 8, 2016 9:22:19 GMT -6
Jose, looking forward to your results. Gordon For all, On the subject of iron in glazes one might read Chinese Glazes by Nigel Wood (1999) and Chinese Ceramic Glazes by Hetherington (1937). Celadon , for example, has roughly 2% iron oxide and must be fired in reduction to obtain the correct effect. Wood says that FeO is a flux above 900C, page 162.
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Post by mariscal on Nov 8, 2016 12:49:07 GMT -6
Jose, looking forward to your results. Gordon For all, On the subject of iron in glazes one might read Chinese Glazes by Nigel Wood (1999) and Chinese Ceramic Glazes by Hetherington (1937). Celadon , for example, has roughly 2% iron oxide and must be fired in reduction to obtain the correct effect. Wood says that FeO is a flux above 900C, page 162. Hi thanks, I will keep in mind, next week I will try something with lepidolite, lepidolite has iron and high lithium content, we will see Jose
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bbucky
New Member
Married
Posts: 36
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Post by bbucky on Nov 9, 2016 10:35:07 GMT -6
Jose, Regarding the beautiful gold on black reduction piece you have been sharing about. Is it a FF644 base? Another question I had was if the reduction could be accomplished is a second fire? Thank you for setting the bar so high bbucky
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Post by mariscal on Nov 9, 2016 13:10:33 GMT -6
No is FF644, It's a combination of two friets, sorry but is A secret for the moment It took me two years to get here.I will keep this secret a little more You have a post with oxides and firing SCHEDUL
Hugs
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Post by sherri on Nov 13, 2016 21:19:56 GMT -6
Hi Mariscol, Thank you so much for showing your inspirational work. I've done a lot of the alcohol drip reduction at 648 celsius to 815 celsius. I turn the kiln off during the reduction because I have heard that keeping the kiln on during reduction can damage the elements. However, I have not tried higher temperature reduction in my electric kiln. Do you know if I can use the same process of the alcohol drip with the electric kiln turned off during the reduction at 1040 celsius to 1093 celsius? Are these higher temperatures damaging to an electric kiln's elements?
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Post by mohawkpiper on Nov 14, 2016 16:57:40 GMT -6
Hi Sherri, I reduce with the alky drip method in that temp range all the time. I reduce in an electric kiln, and i even do it with the kiln ON. As for damaging the elements.... I haven't done it often enough with standard elements to really know for sure that it is damaging to them but I beleive I heard it was, and I do feel it was a little bit detrimental to them. (Based off a set never getting reduction and a set getting reduction about half the time. ) I think it is minimal though.
I normally use APM's however and I feel there is no negative effect to those with the alky reduction method. The APM's i have been reducing with have well over 200 high temp firings on them with somewhere around half or more being in reduction, and it is still going strong. Our other kiln also has APM's and gets reduced regularly as well but does not have enough firings on it yet to know any better.
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Post by tileman2 on Nov 14, 2016 18:17:30 GMT -6
Sherri:
"Macro Crystalline Glazes" by Peter Issley (A.C. Black) wrote.... firing two oxidation rounds between a reduction firings minimized any damage to elements. If that helps you any..
Tom
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Post by mariscal on Nov 15, 2016 11:47:50 GMT -6
Hi Sherri, yes I'm with Greg and Tom, In any case the best reduction in gas kiln
Jose
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Post by sherri on Nov 15, 2016 19:20:08 GMT -6
Thank you so much Greg, Tom, and Jose. I can see with what you're all saying, It's true that I've got to change the way I do things. From my standard elements that were brand new last year I got just 50 firings. I only single fire, tend to put the ware in wet and freshly glazed, and I keep the lid adjusted very flat and bungs all in so that I always get a localized reduction. So, it's pretty much like a greenhouse in there which I know is horrible on the elements not to mention no real recovery for the elements since I do that and the alky drip sometimes. I wanted to get the APMs but they Jumped up so terribly in price this year that I just didn't know if it was worth it at this time. I've thought too of getting a gas kiln but I like many others am pressed for room. I don't know though that a gas kiln really is better - I think that it's the magician Jose in charge of that gas kiln!
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annie
Junior Member
Posts: 55
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Post by annie on Nov 23, 2016 10:50:54 GMT -6
Spectacular Jose!
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Post by mariscal on Nov 24, 2016 2:09:55 GMT -6
Hi Annie thanks you, see you in spain
Jose
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annie
Junior Member
Posts: 55
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Post by annie on Nov 25, 2016 5:50:11 GMT -6
Can hardly wait Jose!
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