Robert Galejs on wed 18 feb 04
Does anyone have any suggestions on where I might find a *really* white
porcelain slip? There are many companies out there selling slip that is
named all manner of white, but they all turn out rather gray or
yellowish when fired. I mean the kind of white that is the same color
as your standard printer/copier paper. I know it must exist somewhere,
as I have some true white porcelain figurines and a miniature porcelain
tea set sitting on a table at home.
Thanks,
Robert Galejs
Earl Krueger on wed 18 feb 04
On Wednesday, Feb 18, 2004, at 13:39 US/Pacific, Robert Galejs wrote:
> Does anyone have any suggestions on where I might find a *really* white
> porcelain slip?
Robert,
I can't answer your question however it started me thinking.
Titanium dioxide is one of the whitest substances known.
According to my book it has a melting point of 1640 C ( 2984 F).
Wonder if adding TiO2 to your best slip might work?
I don't know what side effects might result.
Earl K...
Bothell, WA, USA
=?iso-8859-1?q?Marilu=20Tejero?= on thu 19 feb 04
How about "Southern Ice" that is a beautiful porcelain...
Try Laguna Clay. and make your slip.
http://www.geocities.com/SoHo/Exhibit/3051
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Krista Peterson on thu 19 feb 04
Hello Robert,
You may have to formulate your own slip. I used to have a recipe but I do not have access to it now but if you can
get a recipe make sure it has Grolleg kaolin in it. That is just about the whitest kaolin you can get. I have made slips with grolleg that were the white you are talking about.
Take care
Krista Peterson
-----Original Message-----
From: Robert Galejs
Sent: Feb 18, 2004 1:39 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Source for *really* white porcelain slip?
Does anyone have any suggestions on where I might find a *really* white
porcelain slip? There are many companies out there selling slip that is
named all manner of white, but they all turn out rather gray or
yellowish when fired. I mean the kind of white that is the same color
as your standard printer/copier paper. I know it must exist somewhere,
as I have some true white porcelain figurines and a miniature porcelain
tea set sitting on a table at home.
Thanks,
Robert Galejs
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Donald G. Goldsobel on thu 19 feb 04
Get some dry Kenji cone 10 porcelain (50lb bag) from Laguna. It is really
white. It is hell to throw unless it is really stiff, but it makes a great
white slip.
Donald
----- Original Message -----
From: "Earl Krueger"
To:
Sent: Wednesday, February 18, 2004 9:51 PM
Subject: Re: Source for *really* white porcelain slip?
> On Wednesday, Feb 18, 2004, at 13:39 US/Pacific, Robert Galejs wrote:
> > Does anyone have any suggestions on where I might find a *really* white
> > porcelain slip?
>
> Robert,
>
> I can't answer your question however it started me thinking.
>
> Titanium dioxide is one of the whitest substances known.
> According to my book it has a melting point of 1640 C ( 2984 F).
> Wonder if adding TiO2 to your best slip might work?
> I don't know what side effects might result.
>
> Earl K...
> Bothell, WA, USA
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
Ivor and Olive Lewis on fri 20 feb 04
Dear Earl,
Sound like a good idea.
But one of the prime qualities of Porcelain is its translucency and
Titanium dioxide is an opacifier, so though this might work to conceal
the discolouration caused by residual, iron other satisfying qualities
might be sacrificed.
I recall that to overcome the drab greyness caused by washing a
laundress would dope the final rinsing water with Ultramarine blue to
brighten white clothes. Perhaps a 0.05% addition of Cobalt Carbonate
might work using the same principle.
Best regards,
Ivor Lewis. Redhill, South Australia
Lee love on fri 20 feb 04
Donald G. Goldsobel wrote:
>Get some dry Kenji cone 10 porcelain (50lb bag) from Laguna. It is really
>white. It is hell to throw unless it is really stiff, but it makes a great
>white slip
>
>
Back home, I used to use recycled Continental Grolleg and also
SuperWhite clay for my white slip.
Lee in Mashiko, Japan
http://mashiko.us
"It seems to me what you lose in mystery you gain in awe" -- Francis Crick
Lee in Mashiko, Japan http://mashiko.us "It seems to me what you lose
in mystery you gain in awe" -- Francis Crick
Fara Shimbo on fri 20 feb 04
Hi, Robert, Donald and Earl,
I have a formula for a really, *really* white porcelain
that you're welcome to try:
White Stallion Porcelain, Fara Shimbo, 2002
35 grolleg
30 Kona F4 (for crystalline glazes) or G-200 feldspar
20 silica
15 EPK
1 part by addition Neodymium oxide.
Using neodymium as a decolorant is a trick I picked up from
glassmakers. Put very simply (more technical infomation
if you ask) neodymium selectively absorbs yellow light and
re-emits it as blue/violet/red light.
White Stallion is very white even without the neodymium,
but with it is so startling white that many people complain
it looks "fake." There's a picture here:
http://crystalline-ceramics.info/ws_with_without_nd.jpg
showing the porcelain without nd on the left and with it on the right.
I use White Stallion both as a casting porcelain and as a
throwing clay. As a throwing clay it's a bit short but as
a casting slip it works fine.
Hope this helps,
Fa
--
=============================================================
Fara Shimbo, Master Crystalliere, Certified Public Nuisance
-------------------------------------------------------------
Shimbo Pottery, PO Box 41, Hygiene, CO 80533 USA 720.702.5201
Crystalline-Ceramics.Info ShimboPottery.com Crystallieri.Org
Klysadel.Net TuranianHorse.Org
=============================================================
Robert Galejs on fri 20 feb 04
We were told that "Southern Ice" cannot be made into a slip, but without
a reason why. Have you actually made slip from Southern Ice?
- Robert
Marilu Tejero wrote:
> How about "Southern Ice" that is a beautiful porcelain...
> Try Laguna Clay. and make your slip.
Bruce Girrell on fri 20 feb 04
> We were told that "Southern Ice" cannot be made into a slip, but without
> a reason why. Have you actually made slip from Southern Ice?
I would think that it depends on what you mean by "slip". Southern Ice is
ostensibly a clay and a mix of clay and water to a flowing consistency would
be considered a slip, so in that way I don't see how anyone could say that
you can't make a slip out of it. OTOH, many people think of slip like Albany
slip. A mixture of Southern Ice and water would perform very poorly in that
respect. It would be way too refractory.
I'm guessing at this point, but Southern Ice to me feels as though it is a
highly refined kaolin, that the particle size is very uniform. It has a
peculiar dry feel to it even when it is at a workable consistency. It tends
to be unforgiving during forming and has very poor green strength. I'm not
trying to make it sound bad; I'm trying to support my conjecture that it is
a pure kaolin with uniform particle size.
Bruce "but it sure is _white_" Girrell
Krista Peterson on sat 21 feb 04
And don't forget the deflocculater.
-----Original Message-----
From: "Donald G. Goldsobel"
Sent: Feb 19, 2004 7:09 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Source for *really* white porcelain slip?
Get some dry Kenji cone 10 porcelain (50lb bag) from Laguna. It is really
white. It is hell to throw unless it is really stiff, but it makes a great
white slip.
Donald
----- Original Message -----
From: "Earl Krueger"
To:
Sent: Wednesday, February 18, 2004 9:51 PM
Subject: Re: Source for *really* white porcelain slip?
> On Wednesday, Feb 18, 2004, at 13:39 US/Pacific, Robert Galejs wrote:
> > Does anyone have any suggestions on where I might find a *really* white
> > porcelain slip?
>
> Robert,
>
> I can't answer your question however it started me thinking.
>
> Titanium dioxide is one of the whitest substances known.
> According to my book it has a melting point of 1640 C ( 2984 F).
> Wonder if adding TiO2 to your best slip might work?
> I don't know what side effects might result.
>
> Earl K...
> Bothell, WA, USA
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
______________________________________________________________________________
Send postings to clayart@lsv.ceramics.org
You may look at the archives for the list or change your subscription
settings from http://www.ceramics.org/clayart/
Moderator of the list is Mel Jacobson who may be reached at melpots@pclink.com.
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