James Dapogny on wed 30 jul 97
>----------------------------Original message----------------------------
>I don't know - I am having some problems with an old c10 glaze of mine - no
>GB and am "washing" it. I suspect there is a solubility problem simply
>because the glaze (some of it) has been in that bucket for 10 years. Anyway
>- washing a glaze - put lots of extra water in the glaze, stir well, let
>settle for a day or two - then syphon off the clear water - every time you
>do it you remove some of the solubles.
Ron, (or anyone),
Am I correct in my understanding that solubles can be eliminated somewhat
by siphoning off the separated water in a glaze, but when the water simply
evaporates from the glaze it will not take the solubles with it?
I am still pondering the shelf life question.
thanks. -- Gail Dapogny in Ann Arbor
Ron Roy on fri 1 aug 97
Hi Gail,
>Ron, (or anyone),
>Am I correct in my understanding that solubles can be eliminated somewhat
>by siphoning off the separated water in a glaze, but when the water simply
>evaporates from the glaze it will not take the solubles with it?
>I am still pondering the shelf life question.
You have it exactly right.
Ron Roy
Toronto, Canada
Evenings, call 416 439 2621
Fax, 416 438 7849
Studio: 416-752-7862.
Email ronroy@astral.magic.ca
Home page http://digitalfire.com/education/people/ronroy.htm
Craig Martell on fri 1 aug 97
At 09:00 AM 7/30/97 EDT, you wrote:
>Ron, (or anyone),
>Am I correct in my understanding that solubles can be eliminated somewhat
>by siphoning off the separated water in a glaze, but when the water simply
>evaporates from the glaze it will not take the solubles with it?
>thanks. -- Gail Dapogny in Ann Arbor
Hello Gail:
Yes, according to what I've experienced with ash glazes, you can wash
solubles from the glaze. In fact, this is explained very well by Phil
Rogers in his book Ash Glazes. Robert Tichane has also written a book
called Ash Glazes and he deals with the washing issue as well.
My ash glazes used to turn to pudding from the action of soluble alkali. I
had to use them as soon as they were mixed or forget it. Adding water to
bring them to a manageable consistency made the application too thin. I now
wash all my wood ash and can store the glazes indefintely with no
significant changes in fluidity. Another bonus of washing the ash is that I
can make the glazes fit the body and eliminate most crazing problems by
reducing the high expansion soluble alkali. I don't want to remove all the
soluble alkali, just enough to eliminate long term problems with the glaze slip.
See you at the sink, Craig Martell-Oregon
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