Cindy Strnad on thu 8 jun 00
Linda,
If the glazes have any clay content, you can aid the suspension by adding
1-2% bentonite. It has to be added during dry mixing (if you do dry mixing)
or mixed separately with water (use an old blender no longer needed for
food) and then added to the glaze. If the glaze contains no clay, there's
nothing for the bentonite to work with, and it won't help. Try adding at
least 5% of some type of clay.
Cindy Strnad
earthenv@gwtc.net
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
sdpotter@GTE.NET on thu 8 jun 00
Hi Linda,
I've had the same problems in the past, as well but I never thought
about it until now. I would try a little CMC, Veegum T or anything
like these. Maybe test some Bentonite with the recipe and see if the
extra clay changes anything.
Steve
----------
> From: TheClosetPotter@AOL.COM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: ? suspending hi frit glazes
> Date: Wed, 7 Jun 2000 18:31:54 EDT
>
>I've come across glaze recipes that list a frit as the major ingredient;
once
>mixed they tend to sink like a rock rendering them unusable. What is the
>best approach to keeping these glazes in suspension? Thanks.
>
>Linda Paul
>TheClosetPotter@aol.com
>Kew Gardens, New York
>
>___________________________________________________________________________
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WHC228@AOL.COM on fri 9 jun 00
Linda
V GUM T about 1/2 of 1% is enough. Works for me in glazes that are half frit
and almost no clay.
Bill
Ron Roy on mon 12 jun 00
This is a problem mostly with the high alkaline frits - some of the sodium
can go into solution and defloc the glaze. I recommend using ball clays
instead of kaolin - then some bentonite - then a suspending agent like
epson salts if necessary.
Try to choose frits with lower amounts of alumina in them - then you can
have more raw clay in the bucket.
If you want to post the glaze I will see if it's possible to alter it
enough to cure the problem.
RR
>I've come across glaze recipes that list a frit as the major ingredient; once
>mixed they tend to sink like a rock rendering them unusable. What is the
>best approach to keeping these glazes in suspension? Thanks.
>
>Linda Paul
>TheClosetPotter@aol.com
>Kew Gardens, New York
>
>_____________________________________________________________________
Ron Roy
93 Pegasus Trail
Scarborough
Ontario, Canada
M1G 3N8
Evenings 416-439-2621
Fax 416-438-7849
TheClosetPotter@AOL.COM on tue 13 jun 00
> If you want to post the glaze I will see if it's possible to alter it
> enough to cure the problem.
> RR
Hi Ron and thank you for the suggestions and your kind offer. As you
suggest, I will replace the kaolin with ball clay, add some bentonite (2%),
and then add some epsom salts, a little at a time, to see if that helps.
The following raku glaze is almost entirely frit and sinks with lightening
speed. Can a glaze with this much frit and so little clay be successfully
suspended?
Meisel Blue Raku (from Gary Ferguson's website, thanks Gary!)
Frit 3110 100
Tin Oxide 10
EPK 5
Copper Carbonate 1
Linda Paul
TheClosetPotter@aol.com
Kew Gardens, New York
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