mel jacobson on thu 22 oct 09
i have placed three pictures from carol marians on my clayart
website/click below:
three tiles, same glaze, downfired three ways.
if you have a question that downfiring does not do much, these three
tiles will give you a new look.
electric kiln
cone 6
same glaze
three very different glazes.
TOTALLY AMAZING
mel
from: minnetonka, mn
website: http://www.visi.com/~melpots/
clayart link: http://www.visi.com/~melpots/clayart.html
new book: http://www.21stcenturykilns.com
Veena Raghavan on thu 22 oct 09
Fascinating, Mel,
Thank you for sharing this with us. It certainly shows what you and others
have been talking about.
Veena
In a message dated 10/22/2009 6:57:23 AM Eastern Daylight Time,
melpots2@VISI.COM writes:
>
> i have placed three pictures from carol marians on my clayart
> website/click below:
>
> three tiles, same glaze, downfired three ways.
>
> if you have a question that downfiring does not do much, these three
> tiles will give you a new look.
>
> electric kiln
> cone 6
> same glaze
> three very different glazes.
> TOTALLY AMAZING
> mel
>
VeenaRaghavan@cs.com
John Hesselberth on thu 22 oct 09
On Oct 22, 2009, at 6:57 AM, mel jacobson wrote:
> three tiles, same glaze, downfired three ways.
And for some more images go to:
http://www.masteringglazes.com/Pages/faqframe.html
and click on 'Click here' in the second question.
Or go to my 2004 NCECA presentation at
http://frogpondpottery.com/nceca2004/p18.html
and look at that slide and 2 or 3 subsequent ones.
Ron and I are delighted that both gas and electric firers are
exploring slow cooling. It was not many years ago that one of the
major kiln manufacturers (not L&L or Paragon--they have always been
major supporters of our work) castigated "Mastering Cone 6 Glazes" for
recommending firing down because they said it would ruin element life.
That kiln manufacturer now seems to think they have invented slow
cooling.
Of course gas kilns often cool fairly slowly naturally because they
are usually well insulated. Electric kilns have skimpy insulation and
need to be fired down to get the benefit of slow cooling. But it is
great to see gas firers realizing the benefit also.
I would add that our work showed that slow cooling was the only way to
make a truly durable matte glaze. Glazes that are matte when rapidly
cooled are usually that way because they weren't full melted in the
first place and, hence, are not composed of "good glass".
Just some random thoughts to add to your consideration of whether or
not to control your rate of cooling. It really is more important than
the rate of heating.
Regards,
John
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