Joyce Lee on sun 13 jan 02
I must have 4,000 plus test tiles created in the five years I've been in =
pottery.... actually, in the first four. When, with the help of =
claybuds, workshops and experience, I began to feel slightly more secure =
about firings and forming pots, it was time to get serious about =
selecting glazes and trying them on living, breathing pots.... exciting! =
... didn't take many wasted hours to discover that the results were not =
often the same on the pot as on the tile, even those standup tiles .... =
in fact, they were usually disappointing. So now I glaze whatever =
bisque is available in the three clays I use, getting a much more =
accurate reflection of the glaze's potential.=20
The selected bisqued pots are treated as "tests," and even the better =
ones are retained and stored as test tiles would be. The space =
available on a test bowl offers many more opportunities to observe =
possible effects of the glaze, for example, with more than one coat, =
layered with other glazes, over/under slips (or will when I manage slips =
better), wax/paper resisted etc ... all in one test. It's well worth =
the difference in time expended making the bowl. However, the patchwork =
quilt look does leave some folks exchanging amused, critical glances and =
murmuring, "nice bowl; did you see this glaze? interesting ..."
Joyce
In the Mojave with a new puppy (three days in our house) finally asleep =
here next to the computer, having charged/attacked/conquered every =
article of folded laundry that WAS stacked neatly on the couch waiting =
to be put away .... exhausting task when you're only 8 weeks old.=20
H.M. Buchanan on sun 13 jan 02
Am I correct in thinking that the area on the bowl that did well was
opposite an unglazed surface? As are the tiles. Would that make a
difference?
Judi Buchanan
Wanda Holmes on tue 15 jan 02
Very interesting observation, Judi! Yes, the underside of the good area is
the unglazed bottom of the bowl. Any ideas on why that could be the
deciding factor? Wanda
-----Original Message-----
From: Ceramic Arts Discussion List [mailto:CLAYART@LSV.CERAMICS.ORG]On
Behalf Of H.M. Buchanan
Sent: Sunday, January 13, 2002 12:13 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Re: Glaze Behavior On a pot vs a tile
Am I correct in thinking that the area on the bowl that did well was
opposite an unglazed surface? As are the tiles. Would that make a
difference?
Judi Buchanan
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H.M. Buchanan on tue 15 jan 02
I was just calling your attention to a variable that might have some
influence. Why? I don't know.
It is more likely that you had trimmed the footring so that the bottom was
thinner and therefore absorbed less glaze. When I get unexpected bubbles in
a usually good glaze it is always the thickness of application. Judi
> Yes, the underside of the good area is
> the unglazed bottom of the bowl. Any ideas on why that could be the
> deciding factor? Wanda
Paige Furr on wed 16 jan 02
I have found when doing Majolica on terracotta I sometimes get the same type
of bubbles and pin holes wherethe clay was glazed on both sides but not
where there was an unglazed surface. I believe the reason to be due to
gasses escaping from the clay at maturation. To remidy this I'd bisque to
c/04. Mabye this will help.
Paige in Dallas
>From: "H.M. Buchanan"
>Reply-To: Ceramic Arts Discussion List
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Re: Glaze Behavior On a pot vs a tile
>Date: Tue, 15 Jan 2002 14:51:20 -0600
>
>I was just calling your attention to a variable that might have some
>influence. Why? I don't know.
>It is more likely that you had trimmed the footring so that the bottom was
>thinner and therefore absorbed less glaze. When I get unexpected bubbles in
>a usually good glaze it is always the thickness of application. Judi
>
> > Yes, the underside of the good area is
> > the unglazed bottom of the bowl. Any ideas on why that could be the
> > deciding factor? Wanda
>
>______________________________________________________________________________
>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.
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