Michele D'Amico on tue 24 oct 06
Subject: lower glaze temp to cone 6
> This is a beautiful cone 10 glaze. How can I lower it to cone 6 and still
> have the same lovely results?
>
> Jack Troy Matt Black cone 10
>
> 1000 Custer spar
> 1000 F-4 Spar
> 1000 flint
> 750 dolomite
> 650 talc
> 500 OM4 ball clay
> 100 whiting
> 150* cobalt oxide
> 150 iron oxide
> 100 manganese dioxide
> 50 chrome oxide
>
> Thanks,
> Michele
> damicomichele@comcast.net
>
Donna Kat on sat 28 oct 06
On Tue, 24 Oct 2006 07:12:24 -0700, Michele D'Amico
wrote:
>Subject: lower glaze temp to cone 6
>
>
>> This is a beautiful cone 10 glaze. How can I lower it to cone 6 and
still
>> have the same lovely results?
>>
>> Jack Troy Matt Black cone 10
>>
>> 1000 Custer spar
>> 1000 F-4 Spar
>> 1000 flint
>> 750 dolomite
>> 650 talc
>> 500 OM4 ball clay
>> 100 whiting
>> 150* cobalt oxide
>> 150 iron oxide
>> 100 manganese dioxide
>> 50 chrome oxide
>>
>> Thanks,
>> Michele
>> damicomichele@comcast.net
>>
Out of curiousity - have you tried it at cone 6?
Ron Roy on sat 28 oct 06
Hi Michele,
Not a good liner glaze by the way - too much colouring oxide and very low
silica and alumina for a cone 10 glaze
Here is a version with some frit 3278. I would have used 3134 but because
this glaze is oversupplied with MgO it will not work. Probaly still not a
good liner glaze because of all the oxides. Make sure you do not expose
yourself to kiln fumes - both chrome and manganese are both volitile during
firing.
Test well before use - it could be a runner - on the other hand I can
adjust if it needs more melt.
Troy Black @ cone 6 (untested)
-----------------
CUSTER SPAR......... 13.00
F3278............... 16.00
SILICA.............. 14.50
DOLOMITE............ 4.00
TALC................ 19.50
OM-4................ 27.50
WHITING............. 5.50
=RED IRON OX......... 3.00
+cobalt ox........... 3.00
=MnO2................ 2.00
+chorme ox .......... 1.00
----------
109.00
Seger formula
------------------
*CaO........ .35 7.44%
MnO2....... .06 2.11%
*MgO........ .47 7.08%
*K2O........ .05 1.65%
*Na2O....... .13 3.11%
Fe2O3...... .06 3.52%
TIO2....... .01 .34%
B2O3....... .14 3.59%
AL2O3...... .27 10.40%
SiO2....... 2.69 60.75%
RATIO 9.93 (original is 9.91)
EXPAN 420.74 (original is 471.58)
WEIGHT 265.99
>> This is a beautiful cone 10 glaze. How can I lower it to cone 6 and still
>> have the same lovely results?
>>
>> Jack Troy Matt Black cone 10
>>
>> 1000 Custer spar
>> 1000 F-4 Spar
>> 1000 flint
>> 750 dolomite
>> 650 talc
>> 500 OM4 ball clay
>> 100 whiting
>> 150* cobalt oxide
>> 150 iron oxide
>> 100 manganese dioxide
>> 50 chrome oxide
>>
>> Thanks,
>> Michele
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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