stormy on mon 19 mar 07
hi out there. I have been working on new glazes and one in particular calls for "Superior Glaze Clay". I have read the archives and i see that in the US we use #1 glaze clay to substitute this. I recently read here that i should just go and use ball clay but after looking at the chemical breakdown the #1 says it's got a 70-ish % feldspar. when i read on the companys site it said the reason this clay is so durable and good is that its a high feldspathic clay. should I order this or just go ahead and use the ball clay from my local supplier (DelVal). Im just wondering if its worth all the hype and the shipping charge.
Our scientific power has outrun our spiritual power.We have guided missiles and misguided men.
- Martin Luther King, Jr.
When I despair, I remember that all through history the ways of truth and love have always won. There have been tyrants, and murderers, and for a time they can seem invincible, but in the end they always fall. Think of it - always.
- Mahatma Gandhi
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Ron Roy on tue 20 mar 07
Hi Stormy,
It really depends on how much clay is called for and how different the
clays are.
What you need to compare are the analysis of the two clays.
If you can get the analysis for the "Superior Glaze Clay" then it's a
simple mater to sub in a ball clay that is common or even a kaolin.
Calculation makes that kind of substitution easy - send me the analysis and
the recipe and I'll sub in whatever clays you have.
The most common clay used in glazes in North America is probably Old Mine #4
RR
>hi out there. I have been working on new glazes and one in particular
>calls for "Superior Glaze Clay". I have read the archives and i see that
>in the US we use #1 glaze clay to substitute this. I recently read here
>that i should just go and use ball clay but after looking at the chemical
>breakdown the #1 says it's got a 70-ish % feldspar. when i read on the
>companys site it said the reason this clay is so durable and good is that
>its a high feldspathic clay. should I order this or just go ahead and use
>the ball clay from my local supplier (DelVal). Im just wondering if its
>worth all the hype and the shipping charge.
Ron Roy
RR#4
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
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