Marianne Lombardo on tue 16 jul 02
I've been reading about, hearing about, people applying lower =
temperature glazes over ^6 fired glazes and refiring for special =
effects. Or refiring to make some red-browns more red, etc.
But I tried twice now just putting something that was glazed at ^6 into =
a ^04 bisque load with poor results. The result was that the original =
smooth shiny glaze came out dull and rough feeling. As if it started to =
melt a bit, I guess.
I want to be able to apply a "bead" glaze over a small portion of a pot =
fired with a ^6 glaze. Can anyone tell me what I am doing wrong? Do I =
need to refire at only ^08 or ^06? I had been hoping to just put it =
into my regular bisque load at ^04.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
Charles Moore on tue 16 jul 02
Hi, Marianne,
Following Cindy Strnad's suggestion, I have occasionally re-fired a piece to
^06, which tends to matt the glaze a bit. Sometimes it is effective;
sometimes, not. My position is this: if two firings don't do the job, a
hammer will. It would need to be a very special pot to want to do more,
perhaps for lower fired decorative effects.
Anybody else have similar or different effects in re-firing?
Charles Moore
Sacramento, CA
----- Original Message -----
From: "Marianne Lombardo"
I've been reading about, hearing about, people applying lower temperature
glazes over ^6 fired glazes and refiring for special effects. Or refiring
to make some red-browns more red, etc.
But I tried twice now just putting something that was glazed at ^6 into a
^04 bisque load with poor results. The result was that the original smooth
shiny glaze came out dull and rough feeling. As if it started to melt a
bit, I guess.
I want to be able to apply a "bead" glaze over a small portion of a pot
fired with a ^6 glaze. Can anyone tell me what I am doing wrong? Do I need
to refire at only ^08 or ^06? I had been hoping to just put it into my
regular bisque load at ^04.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
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Ababi on tue 16 jul 02
Hello Marian
Even I the famous glaze addict failed and got bad results.
I think in one of the old PMI was an article by Lili Krakowski on this subject.
It looks like this is an "instant" technique, but like all the other ways of glazing a
must learnt by trial and error. As for the beads, I wrote a few days ago: First apply
thick: Second take your favorite ^04 glaze or ^ 06 glaze or even a raku glaze, you may
test it in the next bisque:
Add to it 10,20,30, or 40 % magnesium carbonate. I did not invent it , yet it works. of
course CMC will help
Ababi, the local potter who tries desperately to learn how to write Hebrew on the
computer.
I have learnt ceramics I would learn the place of the Hebrew letters too!
---------- Original Message ----------
>I've been reading about, hearing about, people applying lower temperature glazes
over ^6
>fired glazes and refiring for special effects. Or refiring to make some red-browns
more red,
>etc.
>But I tried twice now just putting something that was glazed at ^6 into a ^04 bisque
load with
>poor results. The result was that the original smooth shiny glaze came out dull and
rough
>feeling. As if it started to melt a bit, I guess.
>I want to be able to apply a "bead" glaze over a small portion of a pot fired with a ^6
glaze.
>Can anyone tell me what I am doing wrong? Do I need to refire at only ^08 or ^06? I
had been
>hoping to just put it into my regular bisque load at ^04.
>Marianne Lombardo
>Omemee, Ontario, Canada
>mlombardo@nexicom.net
>______________________________________________________________________________
>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.
Marianne Lombardo on tue 16 jul 02
Hello Ababi;
I guess I can't get the effect that I wanted. I wanted the best of both:
durability of ^6 ware and glaze, and just a decorative smear of white beads
of low fire on a small portion of the pot.
With an engobe I am able to get this effect, but it seems not with a shiny
glaze. Oh well, I suppose we can't have everything.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
Carole Rishel on tue 16 jul 02
Are you firing your glazed pot in a kiln with greenware? I've done that =
before and found that the glaze gets all rough and bubbly. The only thin=
g I could figure out is that as the gasses etc from the greenware move in=
to the kiln, it messes up the glaze. I could be wrong!
=20
Carole Rishel
kallahcee@msn.com
Smithville, TX =20
=20
----- Original Message -----
From: "Marianne Lombardo"
I've been reading about, hearing about, people applying lower temperature
glazes over ^6 fired glazes and refiring for special effects. Or refirin=
g
to make some red-browns more red, etc.
But I tried twice now just putting something that was glazed at ^6 into a
^04 bisque load with poor results. The result was that the original smoo=
th
shiny glaze came out dull and rough feeling. As if it started to melt a
bit, I guess.
I want to be able to apply a "bead" glaze over a small portion of a pot
fired with a ^6 glaze. Can anyone tell me what I am doing wrong? Do I n=
eed
to refire at only ^08 or ^06? I had been hoping to just put it into my
regular bisque load at ^04.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
Carole Rishel
kallahcee@msn.com
Smithville, TX
Snail Scott on tue 16 jul 02
At 11:32 AM 7/16/02 -0400, you wrote:
>I've been reading about, hearing about, people applying lower temperature
glazes over ^6 fired glazes and refiring for special
effects...[but]original smooth shiny glaze came out dull and rough feeling.
The results of refiring at lower temps can vary quite
a bit depending on the glaze. The biggest changes tend
to be with glazes that are affected by cooling speed
(either for good or bad). Refiring to a low temp is very
similar in effect to having a really long cool-down cycle,
after the fact. Glazes with the potential to become micro-
crystalline mattes (like with magnesium carb) become much
more matte, for instance, and even glazes that aren't
matte in a normal firing can become so. With copper reds,
it can function a bit like 'striking' the kiln during
cool-down. But, with many (maybe even most) glazes,
there's no visible change at all. Try some other recipes
before you give up on the idea.
-Snail
Evan Clifford on tue 16 jul 02
>From what I have learned about glazes is that they mature at a certain
temperature depending on what materials are in them. During a firing,
the glazes bubble and boil. Then, at a certain temperature the surface
smoothes out giving the gloss finish (Unless it is a matt glaze). So
when you found the rough finish and different color of the ^6 glaze when
it was fired at ^04 it was because it did not mature. I believe that
the higher the temperature you fire it, the better the results you will
have. Hope this answers your question.
-Evan
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG] On
Behalf Of Marianne Lombardo
Sent: Tuesday, July 16, 2002 11:33 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Refiring ^6 Glazes at Bisque Temps
I've been reading about, hearing about, people applying lower
temperature glazes over ^6 fired glazes and refiring for special
effects. Or refiring to make some red-browns more red, etc.
But I tried twice now just putting something that was glazed at ^6 into
a ^04 bisque load with poor results. The result was that the original
smooth shiny glaze came out dull and rough feeling. As if it started to
melt a bit, I guess.
I want to be able to apply a "bead" glaze over a small portion of a pot
fired with a ^6 glaze. Can anyone tell me what I am doing wrong? Do I
need to refire at only ^08 or ^06? I had been hoping to just put it
into my regular bisque load at ^04.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
________________________________________________________________________
______
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.
Marianne Lombardo on tue 16 jul 02
Hi Evan;
You are correct, and I'm sorry, I don't think I explained the problem very
clearly. The piece was first glazed and fired at ^6 to maturity. Then, I
tried putting a ^04 beading glaze on part of the pot and re-firing at ^04.
But the ^6 glaze lost it's sheen and smoothness. The beading glaze was
okay.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
>From what I have learned about glazes is that they mature at a certain
>temperature depending on what materials are in them. During a firing,
Marianne Lombardo on tue 16 jul 02
Hi Carole;
Yes, that's exactly what I was doing. I wonder if you're correct; you may
be this sounds reasonable. I didn't think of that. Since I only have one
piece that I want this effect on I didn't want to put it in the kiln by
itself.
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
>Are you firing your glazed pot in a kiln with greenware? I've done that
before and found >that the glaze gets all rough and bubbly. The only thing
I could figure out is that as the >gasses etc from the greenware move into
the kiln, it messes up the glaze. I could be >wrong!
Marianne Lombardo on tue 16 jul 02
Hi Snail;
So the idea does have some merit? Okay, I'll try some other glazes and see
what happens. I must admit I was trying this only with one particular
glaze. I'll make up some tiny test pots and use a variety of glazes and
put them into my next ^6 glaze firing, then try the beading glaze again on
them and see what happens.
Now, you've got me thinking about experimenting with something else. I have
a pot I tried using John/Ron's Waterfall Brown glaze on that I didn't cool
down slow enough, long enough. I can't make it look worse than it already
does, so I'll stick that into the ^04 load at the same time when I try again
with the beading glaze. Perhaps it will do something for that pot. In
fact, I have a few things that are nice, slow cooled matte glazes. I wonder
if they will come out even nicer this way?
Oh boy, more experimenting and learning. It never, ever stops, does it?
Thanks!
Marianne Lombardo
Omemee, Ontario, Canada
mlombardo@nexicom.net
>Refiring to a low temp is very
>similar in effect to having a really long cool-down cycle,
>after the fact. Glazes with the potential to become micro-
>crystalline mattes (like with magnesium carb) become much
>more matte, for instance, and even glazes that aren't
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