vince pitelka on sun 31 dec 00
> I may be wrong at this, but from the lessons I've learned.. Salt fired
high
> fire is Not to be used for functional work.
> I would love to be proven wrong, since salt fired work tends to sell well
in
> Colorado.
Kim -
I would like to know where this came from. Whether salt-fired wares can be
functional depends on the way you fire and the glazes you use on the
food-contact surfaces. The Germans developed the salt-glaze process in the
late 14th century, and we have been using salt-fired functional wares ever
since. If the food-contact glazes are badly crazed then you have the same
issues concerning durability that you would have in a normal reduction or
oxidation firing, but the pieces are still fully functional as long as they
are not leaching bad stuff.
Please do let us know where you got that information about salt-fired wares
being inappropriate for functional use. There is a lot of unwarranted
alarmism out there.
Best wishes -
- Vince
Vince Pitelka
Home - vpitelka@dekalb.net
615/597-5376
Work - wpitelka@tntech.edu
615/597-6801 ext. 111, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
http://www.craftcenter.tntech.edu/
Kim Peterson on mon 1 jan 01
I stand corrected. I thank you for setting me straight. I checked with those
that gave me the information, And it seems that I misunderstood. They
recommended non-functional, because of the uneven glazing of salt alone..
Porous?
Anyhow.. If there is an undergaze.. No problem. Thanks again for
enlightening me.
Kim
>From: vince pitelka Reply-To: Ceramic Arts Discussion List To:
>CLAYART@LSV.CERAMICS.ORG Subject: Functionality of salt glazed wares Date:
>Sun, 31 Dec 2000 20:32:30 -0600
>
> > I may be wrong at this, but from the lessons I've learned.. Salt fired
>high > fire is Not to be used for functional work. > I would love to be
>proven wrong, since salt fired work tends to sell well in > Colorado.
>
>Kim - I would like to know where this came from. Whether salt-fired wares
>can be functional depends on the way you fire and the glazes you use on the
>food-contact surfaces. The Germans developed the salt-glaze process in the
>late 14th century, and we have been using salt-fired functional wares ever
>since. If the food-contact glazes are badly crazed then you have the same
>issues concerning durability that you would have in a normal reduction or
>oxidation firing, but the pieces are still fully functional as long as they
>are not leaching bad stuff.
>
>Please do let us know where you got that information about salt-fired wares
>being inappropriate for functional use. There is a lot of unwarranted
>alarmism out there. Best wishes - - Vince
>
>Vince Pitelka Home - vpitelka@dekalb.net 615/597-5376 Work -
>wpitelka@tntech.edu 615/597-6801 ext. 111, fax 615/597-6803 Appalachian
>Center for Crafts Tennessee Technological University 1560 Craft Center
>Drive, Smithville TN 37166 http://www.craftcenter.tntech.edu/
>
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Ron Roy on tue 2 jan 01
Salt glazed ware is usually crazed - at least every piece I have looked at
is. Sodium is very susceptable to acid attack so I would not be surprised
if there is a durability issue.
So it would seem those two factors would make salt glazed ware not the
best. I had heard the reason that sewer pipes are no longer made that way
is due to these issues - crazing weakens clay so there were structual
failures and soda is not the best for dealing with the kind of acids we
expect to find down there.
I know I read about this on this list but who and when are beyond my recall.
If there is no toxicity issue in the claze then I would not eliminate salt
glazed ware from my table - it would have to have other redeeming values
though.
RR
>> I may be wrong at this, but from the lessons I've learned.. Salt fired
>high
>> fire is Not to be used for functional work.
>> I would love to be proven wrong, since salt fired work tends to sell well
>in
>> Colorado.
>
>Kim -
>I would like to know where this came from. Whether salt-fired wares can be
>functional depends on the way you fire and the glazes you use on the
>food-contact surfaces. The Germans developed the salt-glaze process in the
>late 14th century, and we have been using salt-fired functional wares ever
>since. If the food-contact glazes are badly crazed then you have the same
>issues concerning durability that you would have in a normal reduction or
>oxidation firing, but the pieces are still fully functional as long as they
>are not leaching bad stuff.
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
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