John Rodgers on sat 13 mar 10
Robin,
I don't know about the chemistry that has taken place to produce the
grit - maybe even the physical process of producing crystals - but ball
milling may be the answer if crystallization is what has happened. If it
is the result of chemical reaction producing a different compound that
crystallized - well, you may be out of luck there.
Just my $0.02.
John Rodgers
Clayartist and Moldmaker
88'GL VW Bus Driver
Chelsea, AL
Http://www.moldhaus.com
Robin Wolf wrote:
> I am using John Post's Cone 6 Dark Tomato Red glaze, and the glaze has
> turned very grainy in the year since I mixed up a 5 gallon batch. I did n=
ot
> realize it had been a year - my how time flies! Anyway, the recipe follo=
ws
> at the bottom of this posting. I have strained it, and have a good heapi=
ng
> cup of grit that strained out of 3 1/2 gallons of glaze. My question is,
> what is this grit? Do I need to find a way to get it back into the glaze?
> Maybe heat it or whiz it in the blender or some-such-thing? I am certain
> that the grit was not there when I first but the glaze together. My main
> question is, does removing the grit from the glaze effect the properties =
of
> this glaze? I love this glaze, and it is a key player in my color pallet=
te,
> both oxidized and reduction. In Oxi, it comes out a very rich chocolate
> color, and in reduction, it has a good deep rusty red. I did glaze a few
> pots without straining the glaze, and there were grains on the
> finished/fired pieces.
>
> Frit 3134 10.8
> Neph Syn 23.1
> Bone Ash 10
> Magnesium Carb 6.2
> Whiting 7.7
> EPK 21
> Silica 21.2
> Bentonite 2
> RIO 20
>
> Robin Wolf
> www.robinwolfpottry.com
> robin at robinwolfpottery dot com
>
>
>
Robin Wolf on sat 13 mar 10
I am using John Post's Cone 6 Dark Tomato Red glaze, and the glaze has
turned very grainy in the year since I mixed up a 5 gallon batch. I did not
realize it had been a year - my how time flies! Anyway, the recipe follows
at the bottom of this posting. I have strained it, and have a good heaping
cup of grit that strained out of 3 1/2 gallons of glaze. My question is,
what is this grit? Do I need to find a way to get it back into the glaze?
Maybe heat it or whiz it in the blender or some-such-thing? I am certain
that the grit was not there when I first but the glaze together. My main
question is, does removing the grit from the glaze effect the properties of
this glaze? I love this glaze, and it is a key player in my color pallette=
,
both oxidized and reduction. In Oxi, it comes out a very rich chocolate
color, and in reduction, it has a good deep rusty red. I did glaze a few
pots without straining the glaze, and there were grains on the
finished/fired pieces.
Frit 3134 10.8
Neph Syn 23.1
Bone Ash 10
Magnesium Carb 6.2
Whiting 7.7
EPK 21
Silica 21.2
Bentonite 2
RIO 20
Robin Wolf
www.robinwolfpottry.com
robin at robinwolfpottery dot com
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