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Post by Arnie Benton on Nov 28, 2015 17:06:00 GMT -6
I'm still on a strike firing exploration. 4 examples -         For the strike firing I heat the kiln to 1400 F, cool at 100 per hour to 1350 and hold for 60 minutes. Then cool at 100 per hour to 1250 and off. I use this schedule because it's one I've been using for years to do post fire reductions - so basically it's a strike firing with or without propane. I've been using a 413/3110 base with small amounts of Fe, Cu, Mn, Co and Ni - varying which are in the top glaze and which are in the bottom glaze - and the proportion of top to bottom glaze. I'm using bowls with a 'gentle slope'. I look at the 'before' pieces and can't see much evidence for what happens with the strike firing. I continue to be amazed by the changes produced by heating to a temperature that is well below where the glaze get fluid, or even 'soft'. It sure looks that there's lots of molecular movement - Arnie |
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Post by tileman2 on Nov 28, 2015 17:26:08 GMT -6
Arnie:
Congratulations sir, you have found the "sweet spot" in layered glaze technique. So it requires both glaze formulation with the proper firing schedule: very well done indeed. Plates 2,4,6, and 8 are very dramatic visually, however plate 7 has a pastel appearance with silver crystals that I find very appealing personally. By the way, I also noticed you have been perfecting crystal to field ratio as well, which also means you have been paying close attention to glaze flow. Impressive!!!
Tom
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Post by jfox on Nov 28, 2015 18:54:19 GMT -6
Arnie
those are beautiful, Ive always used glazes with one colorant then played with different layering schemes gives you alot more possibility's from fewer buckets of glaze even just reversing the coats gives you slightly different results
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asr
New Member
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Post by asr on Nov 28, 2015 21:03:10 GMT -6
Arnie
Those really are results from an expert. Congratulations and thank you for sharing so generously.
Anne
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Post by tileman2 on Nov 28, 2015 21:34:41 GMT -6
Jim-Arnie:
You know it has been 16 years since the last book was printed on the topic of crystalline glaze. None of them covered specialty techniques such as strike firing, silver reduction, etching; and barely touched on reduction. Think we need an update; less the emphasis on clay and forms. One would have to assume a potter who is delving into crystalline glaze already has some background in pottery.
Tom
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drphil
New Member
Been 9 years since i last threw a pot, moving to Maine building a house and a new studio takes time
Posts: 7
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Post by drphil on Dec 1, 2015 13:27:44 GMT -6
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Post by jfox on Dec 1, 2015 16:15:01 GMT -6
I miss Fara, she used to chime in quite a bit on the old forum. hope she's doing well her last posts sounded like she was facing some challenges.
that title sounds like it was written for me and Tom
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Post by Arnie Benton on Dec 1, 2015 18:30:28 GMT -6
I have been using Fara's first book quite regularly - and just put in my order on Amazon for the new one.
I miss Fara too.
We'll see how much she covers the topics Tom suggests above.
I agree Jim (about fewer glaze mixtures producing many more possibilities when layering glazes).
Varying the amounts of each glaze - recently I've been using a ratio of 1/4 lower glaze and 3/4 upper glaze as well as which one is on top.
I'm very curious to know how well this technique works on vase shapes - I have played with bowls with different slopes and settled on a slope that pleases me most - but what about more vertical surfaces? Has anyone gotten the kind of changes in the ground that I've been getting? Or maybe no one has yet added the strike firing to their pieces.
Arnie
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Post by tileman2 on Dec 1, 2015 20:54:06 GMT -6
Dr. Phil:
Thank you for the book link- just wrote it down on my Christmas list: although I have heard Santa's sled is garaged for reindeer overhaul. Rumor has it that Rudolph's' red nose is not genetic, but rather due to over indulgences. In reading the title; "chemistry" got my attention immediately. Finally I do not feel so alone searching and reading chemistry books trying to figure out how this glaze works in specific terms. Rather I figure it out or not: it is nice learning something new after 60 years. Case in point: in reading my chemistry book today: " transitional metals are effected by the introduction of both Lewis acid/s or bases." So now I have to go back and study amphoric oxides which I thought I understood, but learned quickly I did not. So back to the books.
Arnie: cannot answer that question except to say: horizontal pieces pool glaze, and vertical pieces loss a fair percentage.
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