search  current discussion  categories  materials - misc 

calcium borate

updated thu 14 nov 02

 

Lily Krakowski on wed 13 nov 02


There is a long clear lovely explanation of Colemanite and GB in OUT OF THE
EARATH INTO THE FIRE, Mimi Obstler, American Ceramic Society, Westerville,OH
1996.

Basically Colemanite comes from Turkey, is mined etc. GB is not a real
Colemanite, it is/was mined in California , really is ulexite, etc.

I discovered the word "ulexite' reading Emmanuel Cooper, and find it useful
at dinner parties. Since no one knows the term in the US--well not in the
crowd I run into--it is nice to be able to lean across the table and say
stuff like "Well, my dear, if you don't know what ulexite is, what is the
point of talking?" This can be used at most dinner parties. For any
subject....

IN THE STUDIO HOWEVER YOU DANCE WITH THE UN WHAT BROT YOU!!!!!
GB and Colemanite both had reputations of unreliability, needed to be bought
in large quantity so one would not run out of that batch before one had
stabilized the glazes--and I blindy use Frit 3124 in Colemanite/.GB glazes
at the get go, and adjust from there.




Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389

Be of good courage....

Ababi on wed 13 nov 02


Just not Colemanite
Did you ever add pancakes to a steaming hot oil-pen and see the water+oil flying all
over your kitchen, not to say your face?
The colemanite in the glaze does it to your shelves.

In raku glazes when you try to make a low fire,"bad" glaze with crackles it does not
matter if you use Gerstley borate 80 and Nepheline Syenite 20 or frit 80 and feldspar
20 or G.B. 1995 analysis 80 or G.B. of 1998 and so on. The most similar in structure
to the colemanite is the Cadycal 100. From what that I understood of RR words, you
can use it as a 10% of the recipe the for rest frit 3134. Now that I know what Ron
means, I cannot say the English word, something like floating in the structure of the
recipe.
About Ulexite:
Ask Tony Hansen, He must know where to find it.

So else what to do?
If this recipe is unique, you can e mail me and I shall try to rebuild it.
Or try to ignore these recipes the way I ignore a recipe that calls for uranium lead or
from different reasons- gold.
Ababi
---------- Original Message ----------

>There is a long clear lovely explanation of Colemanite and GB in OUT OF THE
>EARATH INTO THE FIRE, Mimi Obstler, American Ceramic Society, Westerville,OH
>1996.

>Basically Colemanite comes from Turkey, is mined etc. GB is not a real
>Colemanite, it is/was mined in California , really is ulexite, etc.

>I discovered the word "ulexite' reading Emmanuel Cooper, and find it useful
>at dinner parties. Since no one knows the term in the US--well not in the
>crowd I run into--it is nice to be able to lean across the table and say
>stuff like "Well, my dear, if you don't know what ulexite is, what is the
>point of talking?" This can be used at most dinner parties. For any
>subject....

>IN THE STUDIO HOWEVER YOU DANCE WITH THE UN WHAT BROT YOU!!!!!
>GB and Colemanite both had reputations of unreliability, needed to be bought
>in large quantity so one would not run out of that batch before one had
>stabilized the glazes--and I blindy use Frit 3124 in Colemanite/.GB glazes
>at the get go, and adjust from there.




>Lili Krakowski
>P.O. Box #1
>Constableville, N.Y.
>(315) 942-5916/ 397-2389

>Be of good courage....

>______________________________________________________________________________
>Send postings to clayart@lsv.ceramics.org

>You may look at the archives for the list or change your subscription
>settings from http://www.ceramics.org/clayart/

>Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.