Russell L. Block on sun 19 nov 00
Any suggestions how to salvage pieces of 06 clay fired with cone 5 clear
glaze to 06 temperature? I.e., can they be re-glazed with 06 clear and
fired without the milky effect of the cone 5 clear underneath, or should it
be attempted to fire them at cone 5 and hope the clay will not melt?
Ann Brink on mon 20 nov 00
If you fire them to cone 5, you are apt to see melted cow-pies on your
shelves, at the very least distorted, discolored bloated and bubbled pieces.
If you have some of the same clay left, and you try a test piece at ^5 and
it's OK, then you could do it. If the pieces are really important to you,
you could test fire successively at ^04, 03, and so on until you can tell
you've gone too far. But your test pieces should be a shape that is
vulnerable to sagging.
If you don't want to do all that, you might try the 05 clear ...or a low
fire frit, it might flux the milky glaze underneath enough to clear it up.
Good luck!
Ann Brink in CA, firing today...can't wait to see how my 18" platter with
white poinsettias, green leaves and iron red background turns out! I went
to WAY more trouble decorating the thing than I usually do. Form is my
love- glazing my challenge.
----- Original Message -----
From: "Russell L. Block"
To:
Sent: Sunday, November 19, 2000 11:18 PM
Subject: 06 clay with cone 5 clear glaze--solution?
> Any suggestions how to salvage pieces of 06 clay fired with cone 5 clear
> glaze to 06 temperature? I.e., can they be re-glazed with 06 clear and
> fired without the milky effect of the cone 5 clear underneath, or should
it
> be attempted to fire them at cone 5 and hope the clay will not melt?
>
>
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Ababi Sharon on mon 20 nov 00
If it is ^06 clay, and you want to test in ^5, put it on a plate, don,t ruin
your shelves!
You can cover with 06 glaze, or any raku glaze.In this case except it to be
runny.
You can try, and cover with engob+cmc, fire it and than cover with desired
glaze.
I got before an angry response so I can offer you:If you are not in love
with this specific piece, try 4-5 different ways, colorings on it and than,
you learn and might want to repeat this mistake!
Ababi Sharon
ababisharon@hotmail.com
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/index.html
* * * * * * * *
www.photoisland.com
ID: sharon@shoval.org.il
Password:clay
----- Original Message -----
From: "Russell L. Block"
To:
Sent: Monday, November 20, 2000 9:18 AM
Subject: 06 clay with cone 5 clear glaze--solution?
> Any suggestions how to salvage pieces of 06 clay fired with cone 5 clear
> glaze to 06 temperature? I.e., can they be re-glazed with 06 clear and
> fired without the milky effect of the cone 5 clear underneath, or should
it
> be attempted to fire them at cone 5 and hope the clay will not melt?
>
>
____________________________________________________________________________
__
> Send postings to clayart@lsv.ceramics.org
>
> You may look at the archives for the list or change your subscription
> settings from http://www.ceramics.org/clayart/
>
> Moderator of the list is Mel Jacobson who may be reached at
melpots@pclink.com.
>
Jean Cappadonna Nichols on mon 20 nov 00
Dear Russell,
Your ^5 glaze will not clear up by refiring with ^06 clear as that is not the
maturation temp for the ^5 glaze. Taking your clay up to ^5 will probably
result in diaster. If you really want to salvage the piece, you could try
using overglazes on the ^5 glaze ( as surface design) and then refire to the
overglaze temp. Good luck,
Jean Cappadonna Nichols
Cindy Strnad on mon 20 nov 00
Hi, Russell.
If you try to fire a true ^06 clay to ^5, you'll get something that looks a
bit like incompletely melted lava rock. Interesting, but not at all
attractive or useful, and difficult to grind from your shelves.
It's possible, if your clay is grossly underfired at ^06, that it may
tolerate firing to ^5. If it does, I suggest you look for another ^06 clay.
The only way to find this out is by experimentation.
On the other hand, is this ^6 clay? Many low-fire clays are good up to ^2 or
3. Your glaze may even melt at these temperatures--some do. It wouldn't be
totally mature, but maybe it would be better than it is now. Whether such a
glaze would be acceptable depends on your tastes, and on the intended use of
the ware.
If the glaze will melt at a temperature that won't destroy the body, that's
excellent. If it won't, then you may be able to save the work by covering
your immature glaze with an opaque glaze. I don't see any way you're going
to be able to keep the clear you had intended for this work, in this case.
It's possible you might find an overglaze which will flux and melt the
mistakenly applied glaze, but that's getting trickier and trickier. Even
applying a low-fire opaque glaze over the top is a bit tricky.
Saving these pieces may involve quite a lot of experimentation. The
experimentation would almost certainly be worth doing, for the sake of
experience, but it may not pay out in returning a useful product to you.
Best wishes,
Cindy Strnad
Earthen Vessels Pottery
RR 1, Box 51
Custer, SD 57730
USA
earthenv@gwtc.net
http://www.earthenvesselssd.com
Nanci Bishof on mon 20 nov 00
Some clays listed as low fire clays are actually underfired clays that don't
reach vitrification till a much higher cone temperature. You could experiment
with a sacrifice piece that you fire to cone 5 with a sheet of high fire clay
under it to catch the molten mess if your cone 06 clay really is a low fire
claybody.
nanci
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