Earl Brunner on wed 26 dec 01
Some kind of cast material, not necessarily clay. Could even be cast clay but in
some kind of powdered form in a binder material like plastic or a glue or resin of
some kind. May not have even been a "glaze" as such, but made out of materials
that would melt and form a glaze.
Tommy Humphries wrote:
> As a sidenote to the red clay firing temperature thread...
>
> Recently a customer came to the store, with a large ceramic pumpkin, which
> appeared to be white earthenware, glazed in garish colors. This pot had
> been outside and was very crazed and stained. The customer wanted to know
> if I could re-fire the pot to clean it up and re-melt the glaze (she had
> done ceramics in the past, and knew about these things...). I explained
> about not knowing the original temperature and all, but she wanted to take
> the risk, so I included the pot in a ^06 test firing.
>
> Upon opening the kiln, I was puzzled by what I saw. The ceramic pumpkin was
> 12" dia. when placed into the kiln, but now it was 8" dia. at the most, also
> it was very mis-shapen. Thought it was way overfired to the point of
> melting.
>
> Reached in to pick it up and the darn thing just crumbled in my hand...kinda
> like burnt bakelite. Even had that plasticky kind of smell. The glaze had
> beaded up on the outside of this husk, and could be easily separated from
> the powder. Crushed, these beads of glaze proved to be glassy in nature.
>
> I am completely puzzled as to the identity of the materials used in this
> thing...any guesses???
>
> Tommy
>
> ]
>
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Earl Brunner
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mailto:bruec@anv.net
Tommy Humphries on wed 26 dec 01
As a sidenote to the red clay firing temperature thread...
Recently a customer came to the store, with a large ceramic pumpkin, which
appeared to be white earthenware, glazed in garish colors. This pot had
been outside and was very crazed and stained. The customer wanted to know
if I could re-fire the pot to clean it up and re-melt the glaze (she had
done ceramics in the past, and knew about these things...). I explained
about not knowing the original temperature and all, but she wanted to take
the risk, so I included the pot in a ^06 test firing.
Upon opening the kiln, I was puzzled by what I saw. The ceramic pumpkin was
12" dia. when placed into the kiln, but now it was 8" dia. at the most, also
it was very mis-shapen. Thought it was way overfired to the point of
melting.
Reached in to pick it up and the darn thing just crumbled in my hand...kinda
like burnt bakelite. Even had that plasticky kind of smell. The glaze had
beaded up on the outside of this husk, and could be easily separated from
the powder. Crushed, these beads of glaze proved to be glassy in nature.
I am completely puzzled as to the identity of the materials used in this
thing...any guesses???
Tommy
]
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