Pam Cresswell on tue 20 jul 10
This is more theoretical in nature, but I am wondering if low fire glazes
benifit from slow cool like ^6 and ^10 glazes do. I fire to ^6, but
sometimes refire pieces with a bit of low fire glaze for a pop of color, an=
d
wonder if a slow cool like Mastering ^6 Glazes advocates (and I follow with
good result) but refigured for low fire range would do for them what it
does for higher fired glaze? Anyone tried it?
Pam
Indian Creek Studios
Ron Roy on thu 22 jul 10
Yes it will work with some glazes - as is the case with higher fired glazes=
.
You do have to find the right range to slow cool in - for all temperatures.
You will also find that refiring will help some glazes recrystallize -
just remember - if you refire to make that happen you don't want to
get the temperature too high because the crystals that have already
formed will remelt.
Some glazes with a lot of boron will have a difficult time forming
crystals - boron never crystalizes.
If you are firing to 04 (1050C) then a slow cool from 950C down to
650C might be a good place to start.
Some one posted her experiments on clayart - about slow cooling - they
were very interesting but I can't remember who it was. Anyone remember
that?
RR
Quoting Pam Cresswell :
> This is more theoretical in nature, but I am wondering if low fire glazes
> benifit from slow cool like ^6 and ^10 glazes do. I fire to ^6, but
> sometimes refire pieces with a bit of low fire glaze for a pop of color, =
and
> wonder if a slow cool like Mastering ^6 Glazes advocates (and I follow wi=
th
> good result) but refigured for low fire range would do for them what it
> does for higher fired glaze? Anyone tried it?
> Pam
> Indian Creek Studios
>
Janine in Tacoma on fri 23 jul 10
Hi Ron:=3D20=3D20
I formerly used a glaze that's posted on John H's Frog Pond Pottery, call=
=3D
ed Oil=3D20
Spot. Contains a lot of Frit 3134, so has quite a bit of boron. This gl=
=3D
aze, fired=3D20
with normal cooling is nearly black, but with slow cooling, develops lusc=
=3D
ious=3D20
blues and greens, and if refired to C06 to "recrystalize," will come out=3D=
20=3D
completely sky blue (baby blue??). And glossy in each version. Wouldn't=
=3D
this=3D20
color change via slow cooling be a result of crystalization? I'd be inte=
=3D
rested to=3D20
hear your take on this. Thanks!
Janine
| |
|
