Comment

Comment by Norm Stuart on February 26, 2015 at 8:56pm

Different transliterations but I've invested the spelling variations with a new meaning.

Generally all but one of the Cornwall Stone or oxidation recipes were Tenmoku, except for one. All of the older reduction recipes were Temmoku. So I changed the m to an n for the one recipe which didn't conform to the pattern.

Now it's a thing to do. if you want.

Comment by George Lewter on February 26, 2015 at 7:34pm

As far as I know the spellings are not intentionally to designate reduction or oxidation, they are just a couple of variations in trying to approximate a Japanese word. Similar to Nipon and Japan - Japan eventually became the accepted mispronunciation.

Comment by Norm Stuart on February 26, 2015 at 6:20pm

In our Insight-Live glaze database Temmoku are reduction glazes while Tenmoku are ^6 oxidation.

Comment by Norm Stuart on February 26, 2015 at 5:11pm

Juli - This is Digitalfire's Original Cornwall Stone recipe.

The original mine was depleted and the new mine has a different chemistry.

100.0%		Cornwall Stone Substitute - not a glaze
30.4%		Feldspar Custer Potash
29.3%		Silica
23.8%		Nepheline Syenite
12.9%		Kaolin
3.3%		Wollastonite
0.37%		Dolomite
0.3%		Strontium Carbonate
0.3%		Zinc Oxide

The last two additions Strontium and Zinc are mine, to more faithfully recreate the Original Cornwal Stone chemistry.

Comment by Norm Stuart on February 26, 2015 at 3:26pm

Alisa Clausen calls the Tenmoku Gold recipe V's Tenmoku Gold.  I have seen others call it Vee's Tenmoku Gold.

So I have renamed it Tenmoku Gold V's ^6.

https://www.flickr.com/photos/glazes/1085550860/in/set-7215760204

I have just added Tenmoku Gold V's w/o Cornwall Stone ^6 my initial "chemically identical recipe" without original Cornwall Stone.  This includes some additions notably the strontium and zinc which are in Cornwall Stone but not in Digitalfire's recipe for Cornwall Stone Substitute. I have found the small amount of zinc to be fairly essential in recreating the look of original Cornwall Stone.

I have subsequently replaced the small amount of soda ash and pearl ash with 2% Minspar-200 Soda Feldspar, while reducing the Silica from 26 to 25 and the English Kaolin from 12 to 11. New Improved "chemically identical' now without soluble ingredients. 

Please feel free to work on this recipe to find a way to reduce the number of ingredients while maintaining the chemically identical status.

Tenmoku Gold Norm's w/o Cornwall Stone ^6 is my renamed "final adaption" we use at our studio, which is not at all "chemically identical" to the original V's Tenmoku Gold.

I suspect my final adaptation could also be simplified somewhat while maintaining the original chemistry.

An obvious place to start is replacing the Wollastonite with more of the Calcium Carbonate and Silica. 3% Wollastonite is probably too small to affect the melting properties much. Or you go in the other direction with more Wollastonite and less Silica, eliminating the Calcium Carbonate aka whiting.

Comment by juli long on February 26, 2015 at 11:10am

The recipe was spelled in John's book, Temmoku , two m's. and not with an "n".  Both spellings are in data base.

The glaze with the Cornwall Stone replacement does not mention the original glaze before the substitution so I'm not sure if its the glaze I was looking at named Temmoku Gold.

So hard to figure out.  I guess if I want to use them I just have to mix some up and test.  Glad to have so many to choose from!

I did not see the recipe for V.C. Soft Satin Glossy 1   in the data base.

Comment by juli long on February 26, 2015 at 10:52am

speaking of Cornwall stone, I saw two glazes in John Britts book last night containing Cornwall Stone, and had to look it up.... Glaze names are Temmoku Gold and V.C. Soft Satin Glossy 1 , both with Cornwall Stone.

Temmoku Gold recipe:  Cornwall Stone 67.4,   Whiting 9,  Silica 6.2,   Dolomite 7.9,   Gerstley Borate 3.4,  Lithium Carbonate 6.2,   Red Iron Oxide 11.2,   Bentonite 2.

V.C. Soft Satin Glossy 1:   Cornwall stone 46,   Wollastonite 10,   Kaolin 10,   Dolomite 12,   Frit 3124  8,   Gerstley Borate 14,   Zircopax 14,   Bentonite 2.

Is the Temmoku Gold recipe with Cornwall Stone replacement in our data base? 

Any idea what the V.C Soft Satin Glossy 1 recipe would be with a replacement?

I'm not savy  with the In -Sight glaze cal. program we use, but hope to get on board for the  interactive Webinar , Thursday , March 5.

Comment by Robert G. Brehmer on February 26, 2015 at 3:59am

the cornwall stone replacement glaze.

Comment by Norm Stuart on February 25, 2015 at 1:06pm

Did you use Cornwall Stone for the Tenmoku Gold recipe, or the Cornwall Stone replacement recipe?

Comment by juli long on February 25, 2015 at 8:49am

sorry, just saw where you said, tenmoku gold. 

j

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