Marianne Bornet on sun 4 mar 01
I was wondering if anyone has any experience of saggar firing in an electric
kiln. I've been told that its not possible because it would damage the
elements. Can anyone enlighten me ?
I think its time that I got myself a software package to help me with glaze
development etc. Are all the packages much of a muchness or is there one
that's better than all the rest. I need one that's not too complicated as
I'm inclined to go into a trance and my eyes glaze over (no pun intended) if
it requires loads of reading up before I can get started !
Thanks in advance
Marianne - in the South of France reeling from the shock of a minor
earthquake and snow all in one week - however the sun is back which helps the
recovery process.
iandol on mon 5 mar 01
Dear Marianne Bornet,
Being the inquisitive type I would be tempted to ask those who say not =
to use this fantastic creative process in an electric kiln "Why"
Ask them to explain their chemistry. Note down everything they say and =
use that as a springboard to sort out truth from the fiction.
When I was teaching I used Saggar firing in an electric kiln. Did not =
notice that it caused the elements any harm.
The advantage of using a saggar is that the container prevents the =
majority of the thee nasty things from getting out. That is the purpose =
of a saggar in these modern times. You can put organics in which create =
reducing conditions when they burn, eliminating oxygen. You can put =
sodium salts in, though this can be a bit tricky because they can react =
with exceptional strength on some clays, so the saggar may need an =
alumina/kaolin wash on the inside to prevent hot corrosion. You can use =
soluble colouring salts, chlorides, sulphates, acetates, citrates of the =
usual metals; Co, Cu, Fe, Mn, Ni, and Cr to dope organic materials which =
will rest on your pots.
Make sure the lids fit well and do not have any holes for air to diffuse =
through and you should be all right.
When people give advice I think it is a good idea to ask them to =
describe their experiences. This separates the knowledgeable from the =
"all knowing"
Hope you have a lot of fun with your project.
Ivor Lewis
Russel Fouts on mon 5 mar 01
Marianne,
>> I was wondering if anyone has any experience of saggar firing in an
electric kiln. I've been told that its not possible because it would damage
the elements. Can anyone enlighten me ? <<
It is possible but it's different from the kind of saggar firing you do in a
pit or in a fuel kiln. I wrap my pots tightly in an envelope of aluminum
foil with just a little bit of newspaper inside. The foil sagger is really
tight so that very little smoke escapes. The kiln should be vented to take
care of the little bit that does get out. The venting is more for my health
than to protect the elements.
One of the limits (but I like limits) is that the foil starts to break up
and develope holes above 650c so I have to stay below that. This means that
you can't use any of the oxides or salts commonly used in saggar firing
because none of them do any thing at that low temperature.
I've been doing this for over 5 years now in a Ceramic Instruments 120 ltr
electric with an Orton Envirovent attached and have seen no change in the
elements.
Please, go to my web site at www.mypot.com to see some pots and we can talk
further.
Russel
Russel Fouts
Mes Potes & Mes Pots
Brussels, Belgium
Tel: +32 2 223 02 75
Mobile: +32 476 55 38 75
Http://www.mypots.com
http://www.Japan-Net.ne.jp/~iwcat
Arnold Howard on mon 5 mar 01
If you contain reduction within the sagger, you will not damage the
kiln's elements.
Arnold Howard
Paragon
--- Marianne Bornet wrote:
> I was wondering if anyone has any experience of saggar firing in
> an electric
> kiln. I've been told that its not possible because it would
> damage the
> elements. Can anyone enlighten me ?
>
> I think its time that I got myself a software package to help me
> with glaze
> development etc. Are all the packages much of a muchness or is
> there one
> that's better than all the rest. I need one that's not too
> complicated as
> I'm inclined to go into a trance and my eyes glaze over (no pun
> intended) if
> it requires loads of reading up before I can get started !
>
> Thanks in advance
>
> Marianne - in the South of France reeling from the shock of a
> minor
> earthquake and snow all in one week - however the sun is back
> which helps the
> recovery process.
>
>
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