[Clayart] Homemade Cone 5 and 6
farmpots at eastex.net
Sun Apr 10 01:55:38 UTC 2022
On 4/8/2022 12:16 PM, ran mcc wrote:
> Does anyone have a recipe for homemade cone 5 and 6 cones?
Randy, I formulated recipes for homemade cones about 20 years ago. I
accurate cones (tested by firing along side commercial Orton cones).
One point to remember: Size of the cone is important. I made plaster
Orton cones for mine. If your comes are smaller they will bend too early and
Since I fire at cone 10, I have good recipes for cones 8, 9, and 10.
But, I think
you could interpolate from them to make cone 5 and 6 cones.
The basic idea in this temperature range is that, in the formula, SiO2
equal to the cone number and Al2O3 is approximately 10% of the SiO2.
So, my cone 8 is:
The recipe is:
Custer feldspar 25.27
OM#4 ball clay 27.04
Cone 10 is:
So, to formulate cone 5 and/or 6, start with the formula and set the
silica in relationship to the cone number.
I don't think it matters too much which fluxes are involved. I simply
same four ingredients, feldspar, whiting, ball clay, and silica, for all
numbers, and they determined the combination of fluxes.
May I ask why you want to do this?
I did it just to see if I could, and to get a better understanding about
and they way they work.
You aren't fearing a zombie apocalypse where commercial cones will be
david at farmpots.com
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