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a question about kaolin grog

updated mon 6 dec 99

 

Arnold Howard on thu 2 dec 99

Dear All:

Do you think sprinkling kaolin grog on the shelf is
better than using sand? What has been your experience?

Do you think the grog or sand protects the shelf
sufficiently from dripping glaze?

Thanks,

Arnold Howard
Mesquite, Texas
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Dannon Rhudy on fri 3 dec 99


Use alumina, Howard, or a 50/50 mix of alumina and kaolin.
Works well, and when you lift out the shelves you can pour
the mixture back into some kind of container and use again
if you like.

Regards,

Dannon Rhudy
potter@koyote.com

At 11:23 AM 12/02/1999 EST, you wrote:
>----------------------------Original message----------------------------
>Dear All:
>
>Do you think sprinkling kaolin grog on the shelf is
>better than using sand? What has been your experience?
>
>Do you think the grog or sand protects the shelf
>sufficiently from dripping glaze?
>
>Thanks,
>
>Arnold Howard
>Mesquite, Texas
>__________________________________________________
>Do You Yahoo!?
>Thousands of Stores. Millions of Products. All in one place.
>Yahoo! Shopping: http://shopping.yahoo.com
>

I.Lewis on sun 5 dec 99

------------------
Arnold Howard asked

'Do you think the grog or sand protects the shelf sufficiently from dripping
glaze?'

My opinion is that if the glazes are known to drip a loose layer of material
will not give protection. Something is needed which will absorb the glaze =
before
it gets to the shelf. I suppose a good analogy would be that atapulgite or
perlite stuff they use as kitty litter, saves poo on the carpet so to speak.=
For
the occasional drips use a good kiln wash, kaolin-alumina mixture. For a =
glaze
which is know to run, place your pots on coasters cut from RI brick and make
sure these have thick kiln wash as well. This technique is well documented =
in
texts about crystalline glazes. I have used it with zinc crystal glazes.

Yes, I use loose material for my general firings. Ware is dry footed and =
floated
on one hundred mesh alumina. I would like to get Kaolin grog for another =
task. I
believe it is also known as Molochite, but my supplier does not carry it.
General grog should not be used. As I have said before, it may be =
contaminated
with glaze. Perhaps that is why there was a lot of chat about grinders and =
their
use recently.

Ivor Lewis. Who enjoyed an evening out with old friends from the South
Australian Potters Guild recently. The fish was superb, So was the lecture =
and
slide show by Michael Capon.