Miles Smith on thu 12 jun 08
Is there a glaze calculation, or material selection, that can allow =
a slip glaze to be applied to biscuit wear? =20
I remember something about substituting calcined Kaolin for China =
Clay, but is that all there is to it?=20
Miles Smith
milessmith@windstream.net
Taylor Hendrix on thu 12 jun 08
Warning, I have yet to try this myself:
Have you experimented with taking some of your slip glaze, drying it
out and calcining it? That may not be as easy as rebatching the glaze
with some calcined clay but it might be easier to use once you had a
quantity of calcined glaze.
Not my idea but one from the list that I have socked away in the moist
noodles of my cabeza.
Taylor, in Rockport TX
On Thu, Jun 12, 2008 at 3:51 PM, Miles Smith wrote:
> Is there a glaze calculation, or material selection, that can allow a slip glaze to be applied to biscuit wear?
> I remember something about substituting calcined Kaolin for China Clay, but is that all there is to it?
Ron Roy on thu 12 jun 08
Hi Miles,
First thing to try it as is - it might work.
Second would be defloccing so less water is needed.
Third - reformulate making it stronger - like ball clay for Kaolin.
Using calcined clay is the fourth thing to try.
The last two should be done using calculation software to allow for LOI and
equalization of oxides.
Let me know if you have questions - RR
> Is there a glaze calculation, or material selection, that can allow a
>slip glaze to be applied to biscuit wear?
> I remember something about substituting calcined Kaolin for China
>Clay, but is that all there is to it?
>
>Miles Smith
>milessmith@windstream.net
Ron Roy
15084 Little Lake Road
Brighton, Ontario
Canada
K0K 1H0
John on fri 13 jun 08
Miles,
There are a couple of easy ways to do it: First try substituting half =
the EPK with Glomax (calcined kaolin). Of course, if you want you can =
calcine your EPK in a bowl and use that. That will give you a bit more =
EPK since it has an 11% LOI (I think, but don't quote me on that).
Second, you can mix up the recipe, leaving out the EPK and then calcine =
half of it and finish mixing it. That will give you the correct amount =
for the formula but eliminate half of the shrinkage.
Hope that helps,
John Britt
www.johnbrittpottery.com/wks.htm
http://ncclayclub.blogspot.com/
Miles Smith on tue 17 jun 08
Could you give a quick thumbnail instruction in calcinng the slip? I'm
thinking: dry it out and fire it to my biscuit temp. and grind it?
miles
----- Original Message -----
From: "Taylor Hendrix"
To:
Sent: Thursday, June 12, 2008 4:16 PM
Subject: Re: I need to apply a slip glaze to biscuit tile
> Warning, I have yet to try this myself:
>
> Have you experimented with taking some of your slip glaze, drying it
> out and calcining it? That may not be as easy as rebatching the glaze
> with some calcined clay but it might be easier to use once you had a
> quantity of calcined glaze.
>
> Not my idea but one from the list that I have socked away in the moist
> noodles of my cabeza.
>
> Taylor, in Rockport TX
>
> On Thu, Jun 12, 2008 at 3:51 PM, Miles Smith
> wrote:
>> Is there a glaze calculation, or material selection, that can allow a
>> slip glaze to be applied to biscuit wear?
>> I remember something about substituting calcined Kaolin for China
>> Clay, but is that all there is to it?
>
Michael Wendt on wed 18 jun 08
Miles,
Dry it in a thin sheet in a shallow dish.
Once dry, put the sheet on a smooth
surface like a Formica count and roll
over it with a rolling pin.
We screen it dry and repeat the rolling,
screen and roll... until we get the desired
quantity, then bisque only to 09 or cooler
to avoid sintering which would bond it
into lumps.
Why unfired? it is way harder to grind
once it is bisque. Remember this is clay
and slip clays can be very strong at
bisque temperatures.
Regards,
Michael Wendt
Wendt Pottery
2729 Clearwater Ave.
Lewiston, Id 83501
U.S.A.
208-746-3724
wendtpot@lewiston.com
http://www.wendtpottery.com
http://UniquePorcelainDesigns.com
miles wrote:
Could you give a quick thumbnail instruction in
calcinng the slip? I'm
thinking: dry it out and fire it to my biscuit temp.
and grind it?
miles
John on thu 19 jun 08
Miles,
There are a couple of easy ways to do it: First try substituting half =
the EPK with Glomax (calcined kaolin). Of course, if you want you can =
calcine your EPK in a bowl and use that. That will give you a bit more =
EPK since it has an 11% LOI (I think, but don't quote me on that).
Second, you can mix up the recipe, leaving out the EPK and then calcine =
half of it and finish mixing it. That will give you the correct amount =
for the formula but eliminate half of the shrinkage.
Hope that helps,
John Britt
www.johnbrittpottery.com/wks.htm
http://ncclayclub.blogspot.com/
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