Vince Pitelka on mon 24 jun 96
Please DO NOT bisque burnished pieces to cone 08. Jay, I do not know what kind
of clay, slip, and burnishing process you are using, but at the App. Ctr.
every once in a while someone's burnished piece slips into a normal gas or
elecric bisque-fire, and it ALWAYS ruins the burnished surface. On a large
piece, with the amount of work which goes into proper burnishing, this is a
hell of a dissappointment. A polished terra sig surface will of course retain
its shine to ^08 and beyond, but at normal low-fire bisque and glaze
temperatures a true burnish surface will crinkle on a microscopic level,
leaving a matt surface. Jay, I would really like to know what you are doing to
preserve a burnished surface at cone 08. You may be on to something big.
- Vince
Vince Pitelka - wkp0067@tntech.edu
Appalachian Center for Crafts, Smithville, TN
Bugash@aol.com on wed 26 jun 96
My class did a sawdust firing this weekend and the pots I bisqued to ^08
didn't take the smoke well and one I did an detailed terasig design on flaked
off but did blacken nicely. Was that because I busqued to ^08 or because I
should have applied the terasig to greenware?
Ginger in Germantown, MD
Claudia O Driscoll on wed 26 jun 96
Ginger,
The lower you bisque, the more smoke your pots will accept. of
course, some of this also depends upon the clay you use. When I used
white earthenware, I bisqued to cone 010 and got some wonderful
smoke. Now, with raku clay, I bisque to cone 06. Any higher than that
would greatly reduce the smoking.
Sometimes it is just 'happens'. I find that windy days are better for the
swirling effect of the smoke. Wet days give me darker pots. And then
there are the fires that are just PERFECT and I do not know why.
claudia
Kelley Dean on thu 27 jun 96
If you bisque before a pit or sawdust fire, you limit the interaction
between the smoke and the clay--it winds up being half a reaction. Also
the ter.sig should be applied to clay well past leather hard and
burnished, but not fired past about ^01. so I guess the answer is both
created the problems that you encountered. kelley dean
On Wed, 26 Jun 1996 Bugash@aol.com wrote:
> ----------------------------Original message----------------------------
> My class did a sawdust firing this weekend and the pots I bisqued to ^08
> didn't take the smoke well and one I did an detailed terasig design on flaked
> off but did blacken nicely. Was that because I busqued to ^08 or because I
> should have applied the terasig to greenware?
> Ginger in Germantown, MD
>
| |
|
