Other Glazes that Develop Complex Surfaces

I've been testing Richard Busch's Nutmeg (from Ceramics Monthly and online at Ceramic Arts Daily) both single fired and on bisque. I tried one combination that I thought looked very good. It is a combination of Hesselbert and Roy variegated slate blue (from Mastering Cone 6 Glazes) over Nutmeg. It breaks up into matte and glossy areas with multiple colors. This firing had a quick cool from cone 6 to 1742 degrees where there was a one hour hold to develop iron red on other pots.

Other combinations with Nutmeg are pictured below. If you can't find the recipes contact me and I will email them to you.

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Permalink Reply by George Lewter on November 2, 2009 at 6:31pm
I found a glaze referred to in the Clayart Listserve called C Harris Temoku, and it is beautiful across my cone 5.2 to 7 firing range. It looks much like Steven's two iron red glazes. I give it a 1 hour soak at 950 degrees centigrade in the cooling cycle. Here are a couple of pix.



All the pots have a thin band of Jen's Juicy Fruit near the top (on the inside of the bowl, outside of the tumblers) The two tumblers on the left were fired to cone 5.2, the two on the right were to cone 7 touched down.
Permalink Reply by George Lewter on November 21, 2009 at 9:04am
My kiln is a manual with two dials. When the kiln sitter trips, I just lift the shutoff flapper slightly and push the reset button to turn the kiln back on, then I lower the flapper gently to avoid tripping the switch again. At that point I can control the temperature of the kiln much like an oven. It does require a thermocouple inside the kiln connected to a pyrometer to get readings of the temperature. Here is a detailed procedure on how to downfire a manual kiln with a kilnsitter.
Permalink Reply by George Lewter on November 21, 2009 at 11:06am
Soak means to hold a temperature for some length of time 1/2 hour, 1 hour, 3 hours . . . to allow heat work to be done, to grow crystals, to allow glazes to intermix in complex ways, etc.
A kiln sitter firing cycle raises the temp until the cone melts enough to trip the kiln off, which then cools so precipitously (particularly at the high end) that there is no time for crystals to form, or for mixing to occur before the glaze is too stiff for those things to happen.
Permalink Reply by George Lewter on November 4, 2010 at 6:11am
I had a double success with my Nov. 1 firing. Single firing worked fine with no losses. I'm seeing results that could easily be mistaken for cone 10 reduction or even wood fired wares. Pictures are posted here.

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