Adrian & Jackie Brien on wed 8 nov 06
Hello Lyndi
The following is an outstanding ^6 oxidation glaze. It' s reliable and
I've used it for many years. I guess a drawback could be that it
contains barium although if you're careful- there should be no problem.
It's called #16(I've no idea where that came from.)
#16
Feldspar 43.4
Flint 24.35
Kaolin .98
colemanite 20.3
whiting 1.48
Zinc oxide 3.16
Barium 6.33
Total = 100.00
For colors: add
1. Cream -rutile 6.5%
2. White -tin oxide 7 %
3. Amethyst -Manganese dioxide 5 %
&-rutile 1 %
(this was the "plum" color- although it might be more purple- I think
you could increase the amount of rutile here- say 2%)
4. Topaz yellow Manganese Dioxide 2%
& Rutile 1%
5. Emerald green Copper carbonate 3%
Rutile 1.1 %
6. Opal blue cobalt oxide 1/4%
rutile 3%
7. My cream tin oxide 4%
rutile 2 1/2%
On Wednesday, November 8, 2006, at 06:45 am, Lyndi wrote:
> I am searching for a plum colored glaze recipe. It would need to be
> capable of firing ^6 or ^9 oxidation. Can anyone help?
>
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Ron Roy on sun 12 nov 06
It does indeed look like it may be an outstanding glaze - but a good
example of a glaze that does not need any barium as well.
I have assumed the item called colmanite is Gerstley Borate so I have
calculated what I feel is the same glaze using a frit instead of GB and CaO
instead of barium.
The expansion has dropped a little so if the original was crazing the
revision may not.
I would appreciate knowing how similar these two glazes are if anyone fires
them both on the same clay in the same firing - next to each other and how
far cone 6 dropped beside them.
Custer - 28.0 (can do it with G200 or even F4)
Frit 3134 - 28.0
Whiting - 6.0
Zinc oxide - 3.5
EPK - 10.0
Silica - 24.5
Bentonite - 2.0
Total - 102.0
RR
>Hello Lyndi
>The following is an outstanding ^6 oxidation glaze. It' s reliable and
>I've used it for many years. I guess a drawback could be that it
>contains barium although if you're careful- there should be no problem.
>It's called #16(I've no idea where that came from.)
>#16
>Feldspar 43.4
>Flint 24.35
>Kaolin .98
>colemanite 20.3
>whiting 1.48
>Zinc oxide 3.16
>Barium 6.33
>Total = 100.00
>
>For colors: add
>1. Cream -rutile 6.5%
>2. White -tin oxide 7 %
>3. Amethyst -Manganese dioxide 5 %
> &-rutile 1 %
>(this was the "plum" color- although it might be more purple- I think
>you could increase the amount of rutile here- say 2%)
>4. Topaz yellow Manganese Dioxide 2%
> & Rutile 1%
>5. Emerald green Copper carbonate 3%
> Rutile 1.1 %
>6. Opal blue cobalt oxide 1/4%
> rutile 3%
>7. My cream tin oxide 4%
> rutile 2 1/2%
>
>On Wednesday, November 8, 2006, at 06:45 am, Lyndi wrote:
>
>> I am searching for a plum colored glaze recipe. It would need to be
>> capable of firing ^6 or ^9 oxidation. Can anyone help?
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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