Beth Spindler on sun 25 feb 07
Took a workshop from a production pottery many years ago and he never used wax on bottoms...he took a long, rectangular-shaped piece of foam rubber( from the fabric store) and dampened it. Had it on a table and after he glazed a pot - dipped or poured the glaze over the pot - he would take the pot and press the bottom into the foam rubber and turn it so that the glaze would come off on the sponge - if there were finger marks on the pot where he had held the pot, he just took a small brush and covered it. most of the time though, he didn't have any problem. he did hundreds of pots in an afternoon with this method - fascinating to watch.
Beth in VA working on a clay plaque to hang near the kiln.....and trying to figure out a shelf/altar place for my grandma's coiled basket while I fire, maybe just above the kiln's lid when opened? maybe put the cones in the basket? hmmmm....
HEY Kathryn....kiln named HOT STUFF??? Go for it....maybe rig it so when opened it plays the tune?? :) :)
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Gayle Bair on mon 26 feb 07
I use a dense 1/4" thick sponge cut into a 14" circular shape.
I wet, squeeze most of the water out and place it on my wheel head.
The glaze wipes off the bottoms of pots easily and evenly. I glaze all
my pots at one time and then quickly clean the bottoms with the wheel
turning
(find the speed that works best for you). If you increase the pressure you
can
vary the amount of glaze removed.
A quick dunk in water cleans the sponge when it gets saturated with glaze.
After doing this I apply wax resist with alumina hydrate to prevent
plucking.
Gayle Bair
Tucson AZ
-----Original Message-----
From: Beth Spindler
Took a workshop from a production pottery many years ago and he never used
wax on bottoms...he took a long, rectangular-shaped piece of foam rubber(
from the fabric store) and dampened it. Had it on a table and after he
glazed a pot - dipped or poured the glaze over the pot - he would take the
pot and press the bottom into the foam rubber and turn it so that the glaze
would come off on the sponge - if there were finger marks on the pot where
he had held the pot, he just took a small brush and covered it. most of the
time though, he didn't have any problem. he did hundreds of pots in an
afternoon with this method - fascinating to watch..
louroess2210 on mon 26 feb 07
On Feb 26, 2007, at 2:03 AM, Gayle Bair wrote:
> After doing this I apply wax resist with alumina hydrate to prevent
> plucking.
Gayle, what is plucking? I'm not familiar with the term in
association with pottery.
Thanks, Lou
Sue Cline on mon 26 feb 07
My understanding is that "plucking" occurs when a small piece of a pot sticks to the kiln shelf when the pot is removed from the kiln. The footring or bottom may have been thoroughly waxed and all glaze removed, but still a small wedge of the fired piece is "plucked" from the bottom. I believe it is more common with porcelain, but frequently encounter this also with stoneware at ^6.
I often spread some grog on the shelf to allow the pot to move slightly with the heating/cooling cycle.
Sue Cline
Cincinnati, OH
-----Original Message-----
>From: louroess2210
>Sent: Feb 26, 2007 10:15 AM
>To: CLAYART@LSV.CERAMICS.ORG
>Subject: Re: Wax for bottoms - sponge maybe?
>
>On Feb 26, 2007, at 2:03 AM, Gayle Bair wrote:
>
>> After doing this I apply wax resist with alumina hydrate to prevent
>> plucking.
>
>Gayle, what is plucking? I'm not familiar with the term in
>association with pottery.
>Thanks, Lou
>
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