Electric Mid&Hi Fired Ceramics
Potters & Sculptors - Making Rock from Mud
New Coyote glazes
Check out the new Coyote glazes. 3 macros, an Aventurine & an Iron Red. All slow-cooled......jhp
Comment
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Comment by Nadine Mercader on June 10, 2014 at 5:52am
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They are great Jeff!
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Jeff - It's nice that commercial glaze makers have begun to sell macro-crystalline and slow-cool products.
I proves macro-crystalline glazes don't inherently have to run all over the place. The blue is nice.
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So here are the 3 macros. They are very well behaved. My Skutt errored out and I Had to respray them with more glaze & fire them in my L&L. They wouldn't have run at all had I just fired them in my L&L first. I did not cool all the way to 1400F as suggested, but stopped at 1700F, then ramped back up to 1850, held, & then went 50F/hr down to 1650, held & then off. I like the Lagoon on the best..... jhp
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Hi Nadine,
As soon as they get here & I have a chance to try them out, I will let you know. I'm with Norm on this. It can be done. My friend has done it & there are several several others out there that have done it. Now Coyote. It's all in the formulation. I've been chasing it for a long time. jhp
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Macro-crystalline glazes require a large amount of zinc and silica to form zinc silicate crystals, and thus a fairly high ratio of silica to alumina.
But in my experience this doesn't mean macro-crystalline glazes have to be formulated in a way they're so fluid they require glaze catchers. I think those are merely the most commonly used formulations.
I too would like to hear users feedback as to the flow rates of these slow-cool Coyote glazes, but the glaze and the firing could easily be formulated to minimize flow.
Most published macro-crystalline firing techniques call have the kiln linger far longer at higher temperatures, often with repeated cycles - leading to large quantities of glaze flow.
Coyote is calling for a relatively fast slow-cool of 125 F per hour between 2,150 and 1,400 F - a wider temperature range of slow-cooling than the 1,800 to 1,500 F range we use at 50 F per hour.
Crystal Lagoon
Mars Red Iron
Ivory Crystal
Crystal Celadon
Autumn Spice
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Jeff, Does your firing these agree with their statements that you don't need anything special to catch runoff? If that is true it would influence my desire to try them out.
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The hyperlink is below.....
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coyoteclay.com
Heres one, I can't get the rest to work jhp
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Jeff - photos or links?
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