Andrew Lubow on sun 19 oct 97
I'm sorry if this a duplicate posting. I had a problem with my server for a
couple of hours and I'm not certain if this got out.
Here's a formula for an Egyptian Paste that will make a self glazing turquoise
body. (The glaze is supplied by the soluble salts of soda drawn to the surface
as it dries), Be careful not to overhandle the items you make as it will rub
off the soda. Also be careful in the firing so the glaze does not stick to
your kiln shelves. The beads should be supported on straight lengths of
element wire and separated to prevent sticking to each other. Fire to Cone
013. This body is highly toxic. A mask should be worn when preparing the body
and rubber gloves as a precaution.
Nepheline Syenite 39
Soda Ash 4
Sodium Bicarbonate 4
Kaolin 6
Flint 37
Bentonite 2
Copper Oxide (colorant) 3
Lithium Carbonate 4
I've used the formula above successfully. You could also experiment with the
following possible additions:
Other colorants:
Browns Burnt Umber 2-3%
Light Blue Cobalt Oxide 0.5%
Medium Blue Cobalt Oxide 1%
Dark Blue Cobalt Oxide 1.5-2%
Green Chrome Oxide 1.5-5%
Olive Iron Oxide 8%
Purple Manganese Dioxide 2%
Pink Iron Oxide 1%
Tan Burnt Umber 2-3%
Tan (Earthy) Yellow Ochre 4%
Tan (Warm) Rutile 3%
Turquoise Copper Oxide 2.5-4%
Andrew Lubow on thu 6 nov 97
Although I've never tried rewetting a piece it most likely helps bring fresh
salts to the surface that form the glaze. I can't help with your question on
firing on a kiln washed shelf since I only do it with the piece supported by
wires. If it's a help when I do a flat (pancake) piece where only the front
and edges are viewed of the piece, I let the project dry on a piece of glass
or plexiglass. To my eye this forces all the evaporation and salts to the
exposed areas and nothing forms on the bottom of the piece. You may be able to
fire this on your kiln shelves if you construct a piece this way.
----------
From: Beverly B Haas
Sent: Wednesday, November 05, 1997 3:48 PM
To: CLAYART@LSV.UKY.EDU
Subject: Re: Egyptian Paste Recipes ^013
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----------------- Message requiring your approval (71 lines)
------------------
Dear Andrew,
I just got some Egyptian Paste from AMACO (1#dry tourquoise $4.50 and
1#dry black $5.40) and have formed some of the turquoise. It definitely
has
a different feel to it. I was interested to read your suggestion about
not
overhandling it. AMACO also suggested brushing molded pieces (after out
of
the mold) with a damp brush as that would help the glazing process. Do
you
know why that is? They also said to just fire the pieces on a kiln shelf
that
had been covered with kiln wash. Have you ever done that? Does kiln
wash stick to the pieces? AMACO's Eqyptian Paste is rated for ^06.
Thanks for
your info!
Bev Haas
barhaas@juno.com
On Sun, 19 Oct 1997 14:03:58 EDT Andrew Lubow
writes:
>----------------------------Original
>message----------------------------
>I'm sorry if this a duplicate posting. I had a problem with my server
>for a
>couple of hours and I'm not certain if this got out.
>
>Here's a formula for an Egyptian Paste that will make a self glazing
>turquoise
>body. (The glaze is supplied by the soluble salts of soda drawn to the
>surface
>as it dries), Be careful not to overhandle the items you make as it
>will rub
>off the soda. Also be careful in the firing so the glaze does not
>stick to
>your kiln shelves. The beads should be supported on straight lengths
>of
>element wire and separated to prevent sticking to each other. Fire to
>Cone
>013. This body is highly toxic. A mask should be worn when preparing
>the body
>and rubber gloves as a precaution.
>
>Nepheline Syenite 39
>Soda Ash 4
>Sodium Bicarbonate 4
>Kaolin 6
>Flint 37
>Bentonite 2
>Copper Oxide (colorant) 3
>Lithium Carbonate 4
>
>I've used the formula above successfully. You could also experiment
>with the
>following possible additions:
>Other colorants:
>
>Browns Burnt Umber 2-3%
>Light Blue Cobalt Oxide 0.5%
>Medium Blue Cobalt Oxide 1%
>Dark Blue Cobalt Oxide 1.5-2%
>Green Chrome Oxide 1.5-5%
>Olive Iron Oxide 8%
>Purple Manganese Dioxide 2%
>Pink Iron Oxide 1%
>Tan Burnt Umber 2-3%
>Tan (Earthy) Yellow Ochre 4%
>Tan (Warm) Rutile 3%
>Turquoise Copper Oxide 2.5-4%
>
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