glazenerd
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Everything posted by glazenerd
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Mark: built my last house in 2018: sold off ski steers, trucks, backhoe, trailers, etc in .2018/2019. Since then, I only do high end finish work. Custom cabinets, wainscot, crown work, custom only wood/Ceramic. Already put the word out; cutting back to 7-8 months next year. Time for the young people to step in. -
Mark: One of the drawbacks of any trade: downsizing when the time comes. Took off before Thanksgiving, and not going back until Jan1-12. Never took that much time off in 45 years. I like it!
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Well Mark- you have a 35CF car kiln=== just sayin... I would love nothing more than to stay where I am at. Yet, I know that I will not be able to take care of it as time marches on.
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Like Min; moving is in my near future- next year or so. Will have to decide which kilns to keep, which to sell; along with other equipment. I built a 26x44 work studio over a decade ago that is stuffed with equipment and supplies; most of which will not go with me into my golden years. Truthfully, I wrestle with just walking away all together. Would not miss the glaze so much as I would miss the clay-chemistry. Tom
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Harvesting and processing wild clay is an emerging trend; more popular than most realize. Many are processing their own silica, fluxes, etc from wild sources. Natural basalt is gaining popularity for some amazing reds. The best looking celadon I have seen is processed from natural materials. Certainly not profitable or suitable for production: although some are heading that direction. Hunting wild clay is somewhere in the panning for gold category: hoping to find the perfect pit. Firing crystalline; absolute No for me- cannot give up modern kiln controllers. Tom
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Min: the first mention of slow cooling I seen was in an ACERS journal by Edward Orton, Jr. (The cone guy) in 1908. The mid 1970's is when I have noticed changes in modern pottery. However, I also noticed detrimental effects of technology in the last two decades. Modern kilns, glazes, and premix clays makes pottery easily accessible to any and all: which is a good thing. However, the ease of operation does not require the user to acquire any basic working principles of functional or food safety guidelines. We have all seen the end products on EBay and art fairs. That said: technology has opened doors on previously extremely challenging techniques and glazes. I spent all of one month attempting to fire crystalline glaze in an old kiln with a sitter before I quickly realized I was not spending 8 hours babysitting it. Kiln controllers rank high on technological improvement list. Anyone who had or played on a kick wheel: would say the same about an electric wheel. I have been playing around with self glazing clay bodies----one of these days.... T
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Min: the difference between us doing a triaxle and them doing a triaxle: they have PhD behind their names. Which comes back to the thread's premise: they have lab equipment of measure: we do not. Bill- late 60's into the 70's. A standard cone 6 porcelain is 30% KnaO, and cone 10 is 25% KnaO. Heat work being the offsetting factor.
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U of I study found that KnaO was completely melted/spent at 2190F. Above 2230F =/- cristobalite begins to form. In a clay body 3/8-1/2" wall: potassium begins to melt (fluid) at 2044F and sodium 2012F. The combination of these factors is the basis of cone 6 firing target. Ougland & Brindley (British Ceramic Society) found glass content at cone 6 was 61% and glass content at cone 10 was 66%. Mullite at cone 6 was 19% and mullite at cone 10 was 21% Their study was based on a triaxle blend of 1/3 kaolin, 1/3 KnaO, and 1/3 silica. (porcelain). So now you have the why!
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Bill: cone 6 rose up in the early 80's because of power shortages/costs. Ceramics/pottery uses extensive technology; but we only end up seeing the consumer product results. Mines use slurry technology, magnetic separators, and power sievesthat do tons per hour. Orton cones are based in technology (chemistry). The pentameter Laguna uses ensures clay remains reasonably consistent. K26 brick, magnesium insulation, advancer shelves, controllers, relays, and thermocouples. T
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Are you planning on adding tusks? Symmetry looks right to me. You plan to mold this for a bronze cast? -
Nice! -
SaggarPinkBlushlg3 copy.jpg
glazenerd commented on Marcia Selsor's gallery image in Browse Member Galleries
Great piece. -
R2 porcelain specifically blended for crystalline work.
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From the album: Clay Tests
Cone 6 Terra Cotta Unglazed. Body developed from locally sourced (wild) clay with hematite iron source.© TJA2020
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- cone6
- terra cotta
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Testing includes flux variations, modifiers, and clay blending.
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Always liked this pattern. -
Nice work Johnny. -
Very nice pieces. Burnished? -
Very nice forms/effects-well done! -
From the album: Clay Tests
© TJA2020
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From the album: Clay Tests
© TJA2020
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From the album: Clay Tests
© TJA2020
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From the album: Clay Tests
© TJA2020
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From the album: Clay Tests
© TJA2020
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From the album: Clay Tests
© TJA2020
