Mary Lou Lundgren on fri 20 jul 01
what happens when you put an underglaze over a glaze?
my dementia has caused me to use an overglaze over the glaze instead of
cobalt carb...........
so have I totally ruined my pots? I usuually use cobalt carb over the glaze
and now I don't know if I should wash the pots and start all over. I'm in a
panic.
please - a word of wisdom is very much needed...........
where is my brain?
thank you, thank you, thank you.......
Mary Lou
Ababi on fri 20 jul 01
Hi!
I made it once on purpose, applying underglaze mixed with a little
engob (about one spoon to 100 gram stain) .I got kind of almost dry, at
least matte look. I knew what I did and why.
In general this is the Majolica way! you can use (about) 1 part of
commercial stain to 4 parts of G.B. in volume.
I would like to hear about a substitution for it!
Ababi Sharon
Kibbutz Shoval- Israel
officially Glaze addict
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/
http://www.milkywayceramics.com/cgallery/asharon.htm
http://www.israelceramics.org/
---------- Original Message ----------
>what happens when you put an underglaze over a glaze?
>my dementia has caused me to use an overglaze over the glaze instead of
>cobalt carb...........
>so have I totally ruined my pots? I usuually use cobalt carb over the
>glaze
>and now I don't know if I should wash the pots and start all over. I'm
>in a
>panic.
>please - a word of wisdom is very much needed...........
>where is my brain?
>thank you, thank you, thank you.......
>Mary Lou
>________________________________________________________________________
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CINDI ANDERSON on fri 20 jul 01
We did this once (on purpose) with liquid commercial underglazes on a glazed tile.
In many cases the underglaze pulled away into beads of color due to the glossiness
beneath. It was a cool effect but maybe not what you are looking for. I think it
is very unpredictable what will happen with yours, depending on your glaze and
underglaze.
In the words of Clint Eastwood "are you feeling lucky?"
Cindi
Wade Blocker on fri 20 jul 01
Mary Lou,
Do not wash off the underglaze you put on your pots. Just coat your pot
with a transparent clear glaze and fire or refire. Amaco suggests that in
order to make their underglazes food safe, they have to be coated with a
clear glaze. This holds true for underglaze on greenware or on bisqued or
glazed ware. So no harm done that cannot be easily taken care of. Mia in
ABQ
Diane Winters on fri 20 jul 01
Hi Mary Lou,
I've never put underglaze over glaze, though I've certainly done other
strange things when my brain went on vacation without me. But I do have
some advice.
What effect you'll get will probably have a lot to do with the =
composition &
character of your base glaze and your firing temp. So unless someone =
else
has done EXACTLY the same thing, you're taking a real risk. I think you
should wash off and redo - since you mention cobalt, I'm guessing you do
decorative painting of some sort, so redoing means a truly awful amount =
of
extra work. I feel for you.
However, I'd strongly advise going ahead and firing one or two of the
mistake pieces, so you WILL see what the result is. You might have a =
happy
surprise and discover a new technique to explore. At the worst, at =
least
you'll know.
Regards,
Diane
in Oakland/Berkeley trying to figure out where the latest possum's =
spending his daytime hours, now that we're closing the garage door to =
keep him out of the laundry basket
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