Earl Brunner on wed 1 aug 01
Bare clay isn't really the issue as I understand it, especially if the
clay is vitrified high fire. The issue with crazing is the cracks
harboring germs and other nasties. You didn't say what temp she was
firing to.
Sara wrote:
> The crackle glaze issue was intensely discussed at the co-op that I belong to today. Attention shifted to one of our potters who uses Opalescent ( a brand of premix) glazes and intentionally leaves bare spaces on the inside of her functional work. The effect of her design work is pleasant but just exactly how safe is a patch of bare clay on a plate or bowl that ostensibly could be used for food everyday? Needless to say the opinions of the potter's was varied and quite vocal. I offered to submit this to the group for more opinions. Anyone care to comment on this?
>
> many thanks!
> Sara O'Neill
>
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> From: Pat Watkins
> Subject: Dehumidifier Water in Glazes
> To: CLAYART@LSV.CERAMICS.ORG
> Status: O
>
> Nikki,
>
> I am located right out of New Orleans. We have more than enough humidity to
> go around. I have to use a dehumidifier in my studio or nothing would dry.
> On days that our humidity runs over 80 percent, the humidity in my studio is
> kept between 30-40 percent. I have been using a dehumidifier for about 10
> years. I have asked many water distillers about just how pure is the water I
> distill. Usually they are rather reluctant to give away any trade secrets at
> first until I assure them that I would never stop buying their water. This
> is what I have been told. They are several ifs... If the air where the
> dehumidifier is clean. If the collection container and the coils on the
> dehumidifier are kept clean. Then if the storage container for your excess
> water is covered and does not get contaminated. Then you are pretty much
> getting the same as distilled water. It certainly compares with some of the
> "distilled like" waters that you get from some of the chain grocers. What I
> do for my particular circumstances are this. I keep my studio as clean as
> possible. I store my excess water in a clean and covered 10 gallon
> container. I wash the collection container each time I empty it. I use a
> "clean" container to dip out what I need and use that container for nothing
> else. When I mix a batch of glaze I use half purchased water and half my
> distilled water. Because of the high sulfur content in our tap water I also
> use my distilled water for all throwing and other water that I need in the
> studio. I also use the same vendor on purchased distilled water and never
> buy any "distilled like" water. After I jump through all of those hoops I
> pretty much feel that any contamination I might get at this point should be
> minor. But you have to work out a process for your own studio circumstances.
> Hope this helps.
>
> Pat Watkins
> patsraku@cs.com
>
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--
Earl Brunner
http://coyote.accessnv.com/bruec/
bruec@anv.net
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