Luis Trabucco on mon 14 sep 98
I need some recipe for porcelain casting slip.
Thanks who can help me.
Luis
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Penny Hosler on tue 15 sep 98
Luis,
CONE 5-7 White Porcelain Casting Slip (ox) - 1 gallon
1380 grams, or 25 %- Kaolin (Georgia)
552 grams, or 10 %- Feldspar (Custer)
1656 grams, or 30 %- Feldspar (nepheline syenite)
552 grams, or 10 %- Silica 325 mesh
1380 grams, or 25 %- Kentucky ball clay (OM4)
Additives:
5.52 grams, or .10% - Soda ash
22.08 fluid grams, or .40% - Sodium Silicate
13.80 fluid grams, or .25 % - Darvan #7
1564.92 grams(55.2 fluid oz) - Water
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CONE 10-11 White Porcelain Casting Slip (gray in reduction/white in ox)
1951.2 grams, or 40% Kaolin (Grolleg) (English china clay)
1219.5 grams, or 25% Custer Feldspar
975.6 grams, or 20% Silica 325 mesh
731.7 grams, or 15% Kentucky ball clay (OM4)
Additives:
6.09 grams, or .125% Soda ash
19.51 fluid grams, or .40 Sodium silicate
19.51 fluid grams, or .40 Darvan #7
1926 grams(58.29 fluid oz) water
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The above recipes are from "Hands In Clay".
Be sure to mix your sodium silicate and soda ash thoroughly with water
first.
Then add the other stuff. Darvan in last. Mix forever. If your molds
have a lot if fine detail you may want to sieve it -about a 60 mesh screen.
The book says 80 mesh, but IMHO that's overkill. (I don't sieve mine at
all, but if I were doing doll faces or something I might) Note: The amount
of water can get touchy - the book recommends that you weigh a pint of slip.
If a pint of high-fire slip weighs less that 28.5 to 32 oz, there's too much
water in it and it could cause settling.
Penny in Sequim, WA
pshosler@olypen.com
-----Original Message-----
From: Luis Trabucco
To: CLAYART@LSV.UKY.EDU
Date: Monday, September 14, 1998 7:16 AM
Subject: porcelain slip
----------------------------Original message----------------------------
I need some recipe for porcelain casting slip.
Thanks who can help me.
Luis
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FREE Usenet and Mailing list archive, directory and clipping service
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Ababi on mon 2 feb 04
Hi
i intende to use the last 5002 grams of Laguna's ejnglish porecelain as a=
slip over a Paperclay body. I added 10% molochit to pervent caking. Do y=
7ou thyink it is enogh?
should I add another 10% of the white poweder (molochite)?
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