Snail Scott on sat 23 jun 01
At 04:07 PM 6/23/01 -0400, you wrote:
how can we discuss bisque-firing without defining our own firing conditions?
Mariko
Sure, my ^010 (for instance) might be quite a bit
different from yours, due to differences in sitter
calibration, location of the witness cones, length
of firing, atmosphere and a host of other variables.
It really doesn't matter very much.
Because (in my mind, anyway) the exact temperature
of the bisque just isn't very important. A cone or
two difference between my ^010 and yours is irrelevant,
as long as yours is consistent and suitable for your
work, and mine is consistent and suitable for me.
We can talk about ranges of bisque firing; several
people have offered their personal preferences for
high bisque (^04 or thereabouts), middle (^06-^08)
and low (^010 or lower), and discussed the reasons
for their choice. (I just made up those definitions
this minute, but I think you get the idea.) The
reasons for selecting a bisque temperature
aren't specific and unique to a particular cone
number; it's a continuum, and all the factors and
conditions increase or decrease in a roughly linear
fashion. The results don't suddenly change radically
at some fictional 'line' between ^06 and ^05, for
example. Balance the pros and cons of an approximate
range, choose a temperature, and fine tune the choice
to suit your own work.
The only factor that counts is: does it work for you?
-Snail
mariko cruse on sat 23 jun 01
Hi Clayaters:
Today's bisque firing discussions gave me a lot of insight into the =
subject. Thank you!
I have been wondering about the reproducibility and the validity of the =
use of cones. For example, if you set a large cone, a self-standing =
cone, and a kiln-sitter for a given temp., say for cone 6, they don't =
bend equal amount at the same time . The reproducibility may be very =
good. ( I tried that.) But, how about the validity? If we consider =
the validity in this case is to be the type of the cone which gives you =
the most satisfactory result in the outcome of the pot, how can we =
discuss bisque-firing without defining our own firing conditions?
I am a neophyte in pottery, so any comment would be greatly =
appreciated. Mariko
Ron Roy on sat 30 jun 01
There is a situation where it does seem to change dramatically - it's when
suddenly the ware gets bigger - say large platters. The ware starts coming
out cracked - inceasing bisque can be part of the solution to stopping
that.
RR
>The results don't suddenly change radically
>at some fictional 'line' between ^06 and ^05, for
>example. Balance the pros and cons of an approximate
>range, choose a temperature, and fine tune the choice
>to suit your own work.
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Studio 613-475-3715
Fax 613-475-3513
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