annie
Junior Member
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Crazing?
Oct 7, 2016 11:05:06 GMT -6
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Post by annie on Oct 7, 2016 11:05:06 GMT -6
Jim, Gabriel, et al, I love Jim's work--and both sides of the pot he posted. It's all individual tastes.
As for precision, the further you go down the crystalline rabbit hole the more you realize you can't really control everything like other artistic mediums; certainly not just with precise glaze calculations anyway (as Piper says too). There's simply too many other variables.
Also, like Jim, my favourite pots came as a surprise...mine came from my attempt to manually save a load during kiln controller failure recently. I can't reproduce these gorgeous surprises--ever--so they're staying with me for now--but because of this occurrence I'm looking at if I should under-fire a few of my glazes on purpose and naturally cool.
The happy glaze or glazing mistakes, or kiln failures, or Ian Childers drink choice for that matter, take one down paths towards great beauty. (If I could figure out how to post a pic I'd show you some errors that maybe will be my signature glazes or pieces someday.)
Be well and do what feels right to you. We all have our ways that work best for us and your OCD may bear fruit!
As for crazing, silica sorted me out, unless it's on the flat and my kiln shelf isn't level.
--Annie
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Deleted
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Post by Deleted on Oct 7, 2016 11:07:14 GMT -6
I happen to like crazing as well, Jim, but there are some I would prefer not to have it in, so I wanted to learn ways of controlling it.
No problem, my idea about "hijacking" a thread would be if you diverged to a rant about the relative virtues/liabilities of Hillary and Donald. Every post teaches me something I would want to know, which brings to mind a question:
What is the process you use in "silver reduction"?
Thanks again for the input.
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Deleted
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Post by Deleted on Oct 7, 2016 11:27:03 GMT -6
Yeah, Annie, I'd think it wonderful if I could reproduce those pots like Jim's. And I understand the somewhat vain attempts at trying to accurately calculate for crystalline glazes. My philosophy, however, is that the more accurate I can be with the variables under my control I can at least eliminate those variables being the cause of failed results, and look elsewhere.
As for the posting photos, Jim is using an off-site URL for a link to his pics. When I post a picture I just upload it to my photography website and link it from there. But you can post an image, I believe, by just hitting the "Reply" button, instead of "Post Quick Reply" -- and then you select the button along the top that is "insert image" -- the little icon with a landscape image on it.
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Post by mohawkpiper on Oct 7, 2016 23:55:13 GMT -6
personally i dont think the glazes need to be calculated super precise. the recipes i feel are actually pretty forgiving. measuring things to two decimal points is unnecessary in my books. except cobalt maybe. but things like frit, zinc and silica.... half percent changes are the smallest i go and even then results are minimal. to make real changes I can actually see I usually need to do several percent at least changes.
The real control I feel comes from the thickness of the glaze at the time of crystal growth. type of clay, thickness of clay wall, applied glaze thickness, cone bend, glaze flux etc etc....
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annie
Junior Member
Posts: 55
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Crazing?
Oct 8, 2016 2:20:24 GMT -6
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Post by annie on Oct 8, 2016 2:20:24 GMT -6
Well said Greg !
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Deleted
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Post by Deleted on Oct 9, 2016 8:08:01 GMT -6
I agree, Greg. I only use those levels of accuracy when I make micro-batches for single test tiles, since I am only using a few grams at a time in about 10ml of water. And that is only with non-crystalline glazes. And as you mentioned, with crystalline I do use that accuracy for the metal oxides -- especially cobalt.
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annie
Junior Member
Posts: 55
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Crazing?
Oct 9, 2016 8:23:33 GMT -6
via mobile
Post by annie on Oct 9, 2016 8:23:33 GMT -6
Thanks Gabriel for the pic post advice. Try it soon! A few days later.... I've figured out how to post images. Here's the little pots I spoke of which came out of my kiln/controller failure. I love them, even though the crystals are tiny. The glaze looks totally different than previous firings--it went opaque. I especially like the grey secondaries. (Sorry this is off the topic of crazing.) -Annie
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