Donna Hoff-Grambau on wed 19 mar 97
Hello!
I am in the process of trying to replicate some of the Tenmoku recipes
from Joseph Grebanier's Chinese Stoneware Glazes. He talks about
a Red Slate Powder given to him from a source in Granville, New York.
Does anyone know what this is or the composition of it? I would
appreciate the help. Also, anyone know how to achieve the turquoise
effect that sometimes comes with Tenmoku/Temmoku?
Thanks
Donna
Roger Bourland on sun 12 jul 98
Joseph Grebanier uses 'red slate powder" in several of his CHINESE
STONEWARE GLAZES recipes.
Can anyone tell me what this material is? He says it was developed by Dr.
David Holleman from a source in Granville, N.Y. Efforts to use this as a
red clay body proved unrewarding. That's about it.
Any help would be appreciated!
Roger Bourland
Jack Troy on mon 13 jul 98
Re "Red Slate Powder:" Last summer I gathered up some red slate from along the
road in northern Pennsylvania because it looked like something that had a lot
of iron in it. I ran it through the ball mill at Penn State and found that
it makes a tenmoku glaze when combined with wood ash and fired to ^9.
The redness of the slate varied from (sorry for technical jargon here): VERY
red to MOSTLY red, but God's attention-deficit disorder was most pronounced
during the geology phase of creation, so when it comes to prospecting for raw
materials, it's all pretty much up for grabs.
Jack Troy
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