Du Cheval on sat 31 jan 98
Hi, newbie here. I have just started firing my own stuff,(still testing kiln
behavior!) As I'm sure everyone knows, Jr. cones bend at a different temp.
than standard cones (my kiln is one cone difference) so which one is the
correct temp.? Or doesn't it matter since they are so close?
Thanks bunches,
Jim THomas
Don Prey on sun 1 feb 98
Jim,
The standard reference to cone number associated with both clay and glaze
refers to a large cone. If you are firing an electric kiln, use the large
cones on the shelf to give you the correct information about firing
conditions.
Don Prey in Oregon
Lili Krakowski on mon 2 feb 98
All these temperatures are approximate. If you look at the charts you
will see that for each specific.# there are (at least) two temps--one for
faster, one for slower heating. American (Orton) style cones measure
WORK. They are NOT thermometers. This means that they bend when a
certain development has happened in the cone. This is a relationship of
time and heat as working on the cone.
That is why in YOUR kiln the SAME glaze--even from the SAME batch, on the
SAME clay, even from the same package may look different at c.6 let us
say than it did in your identical twin's kiln fired to the SAME cone 6.
takenfrom the SAME box. Except you live someplace where there are no
voltage drops and your twin lives where there are!.
It is usual for the junior cone in the kiln sitter to be a number higher
than the standard cone on the shelf. None of this matters as you will
adjust your glazes to whichever. I adjust my glazes to the standard c. 6
on the kiln shlef at the same level as the kiln sitter, whose cone (except
I now use bars) is c.7.
On Sat, 31 Jan 1998, Du
Cheval wrote:
> ----------------------------Original message----------------------------
> Hi, newbie here. I have just started firing my own stuff,(still testing kiln
> behavior!) As I'm sure everyone knows, Jr. cones bend at a different temp.
> than standard cones (my kiln is one cone difference) so which one is the
> correct temp.? Or doesn't it matter since they are so close?
>
> Thanks bunches,
>
> Jim THomas
>
Lili Krakowski
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