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low-fire salt

updated thu 9 sep 99

 

Naomi Rieder on fri 3 sep 99

Does anyone know for a fact whether or not using salt in low-firings --
either pit or saggar firings--can eventually cause the work to break down or
flake-off, etc.

There is a Clayart archive message, dated 14 Aug. 1997, to this effect, and
a ceramic artist friend recently told me that Paul Soldner's low-fired salt
fumes works have crumbled. Needless to say, those of us who use salt in
pit-firings are a bit concerned.

TIA,

Naomi

June Perry on tue 7 sep 99

Dear Naomi:

Low fired salt pots should not be placed outdoors or in rooms with high
moisture, i.e. bathrooms, kitchen or basements. They will spall. Even a high
fired salt glazed pot can do this. I found out the hard way when I stored an
antique salt glazed jug in the basement for a few years. :-(

Regards,
June

Ray Aldridge on wed 8 sep 99

At 05:32 PM 9/7/99 EDT, you wrote:
>----------------------------Original message----------------------------
>Dear Naomi:
>
>Low fired salt pots should not be placed outdoors or in rooms with high
>moisture, i.e. bathrooms, kitchen or basements. They will spall. Even a high
>fired salt glazed pot can do this. I found out the hard way when I stored an
>antique salt glazed jug in the basement for a few years. :-(
>

I don't doubt you, but I'm trying to imagine what could account for a
high-fired saltglaze jug spalling from ambient moisture. Collectors
sometimes dig old saltglaze out of muddy fields, and they're pretty much as
good as the day they were fired. High temp saltglaze is so non-reactive
that it's used for sewer pipe (or used to be.)

Ray