Kat in the Hat on tue 19 mar 02
Hello All:
My platters spin like a top because the centres have warped outward and =
now they no longer sit on the foot ring. So what am I doing wrong? =20
The platters are about 18" wide, thrown (on plaster batts) with a white =
stoneware, compressed, compressed and compressed. I cover them up right =
away, with a light polyester cloth and then plastic. Let dry out for =
about 4 days. Then trim them with a foot. ( I don't use a chuck for =
trimming)=20
Place them on newspaper, on the rims (upside down) and re-cover them =
with a light dry cleaners plastic. In a couple days they are dried with =
no cracks but the centres have bowed out so much that the platters rock =
on the centre. =20
Oh I have looked in the archives (maybe not in the right place) but I =
could not find anything preciously dealing with this problems. Hummmmm. =
=20
You may be saying "Silly Girl it is uneven drying" I have thought about =
that but don't know how to get around even drying. I dry slow, soooo =
what else should I do? Platter experts help me!=20
Kat=20
kat@digitalfire.com
"You are just jealous because the voices only speak to me"
Craig Clark on tue 19 mar 02
You may be trimming then to thin. Alternatively, it could be the fault
of the clay body. What type of white stoneware are you using? Is it a
particularly "tight" body? If it is then you may need to try out a different
one for your larger platters.It doesn't sound like you're drying them to
quickly.
Craig Dunn Clark
619 East 11 1/2 st
Houston, Texas 77008
(713)861-2083
mudman@hal-pc.org
----- Original Message -----
From: "Kat in the Hat"
To:
Sent: Tuesday, March 19, 2002 9:46 AM
Subject: Rocking Platters! a bad thing.
Hello All:
My platters spin like a top because the centres have warped outward and now
they no longer sit on the foot ring. So what am I doing wrong?
The platters are about 18" wide, thrown (on plaster batts) with a white
stoneware, compressed, compressed and compressed. I cover them up right
away, with a light polyester cloth and then plastic. Let dry out for about
4 days. Then trim them with a foot. ( I don't use a chuck for trimming)
Place them on newspaper, on the rims (upside down) and re-cover them with a
light dry cleaners plastic. In a couple days they are dried with no cracks
but the centres have bowed out so much that the platters rock on the centre.
Oh I have looked in the archives (maybe not in the right place) but I could
not find anything preciously dealing with this problems. Hummmmm.
You may be saying "Silly Girl it is uneven drying" I have thought about that
but don't know how to get around even drying. I dry slow, soooo what else
should I do? Platter experts help me!
Kat
kat@digitalfire.com
"You are just jealous because the voices only speak to me"
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Jennifer F Boyer on tue 19 mar 02
Try cutting long strips of saran wrap and draping just the rim
during drying. This allows the bottom to dry out and strengthen
before the rim starts shrinking and pulling up on the bottom.
Jennfier
Craig Clark wrote:
>
> You may be trimming then to thin. Alternatively, it could be the fault
> of the clay body. What type of white stoneware are you using? Is it a
> particularly "tight" body? If it is then you may need to try out a different
> one for your larger platters.It doesn't sound like you're drying them to
> quickly.
> Craig Dunn Clark
> 619 East 11 1/2 st
> Houston, Texas 77008
> (713)861-2083
> mudman@hal-pc.org
>
> ----- Original Message -----
> From: "Kat in the Hat"
> To:
> Sent: Tuesday, March 19, 2002 9:46 AM
> Subject: Rocking Platters! a bad thing.
>
> Hello All:
> My platters spin like a top because the centres have warped outward and now
> they no longer sit on the foot ring. So what am I doing wrong?
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jennifer Boyer mailto:jboyer@adelphia.net
Thistle Hill Pottery
95 Powder Horn Glen Rd
Montpelier, VT 05602 USA
802-223-8926
http://www.thistlehillpottery.com/
Never pass on an email warning without checking out this site
for web hoaxes and junk:
http://urbanlegends.about.com/
~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*
Jan Goodland Metz on tue 19 mar 02
Kat,
When I flip the plates over to dry I put a plastic bat on the back and on top of that i put some weight, this morning i used a small (12oz.) plastic water bottle filled about 2/3 with water. Then tonight i'll trim them. A litttle weight should help.
Jan
Kat in the Hat wrote:
> Hello All:
> My platters spin like a top because the centres have warped outward and now they no longer sit on the foot ring. So what am I doing wrong?
> The platters are about 18" wide, thrown (on plaster batts) with a white stoneware, compressed, compressed and compressed. I cover them up right away, with a light polyester cloth and then plastic. Let dry out for about 4 days. Then trim them with a foot. ( I don't use a chuck for trimming)
> Place them on newspaper, on the rims (upside down) and re-cover them with a light dry cleaners plastic. In a couple days they are dried with no cracks but the centres have bowed out so much that the platters rock on the centre.
> Oh I have looked in the archives (maybe not in the right place) but I could not find anything preciously dealing with this problems. Hummmmm.
> You may be saying "Silly Girl it is uneven drying" I have thought about that but don't know how to get around even drying. I dry slow, soooo what else should I do? Platter experts help me!
>
> Kat
> kat@digitalfire.com
> "You are just jealous because the voices only speak to me"
>
> ______________________________________________________________________________
> 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.
WHC228@AOL.COM on tue 19 mar 02
Drying upside down can be the problem. The side that dries first shrinks
first. The platter bows toward that side. Dry them right side up, and maybe a
little faster.
Bill Campbell
claybair on tue 19 mar 02
Instead of long strips of plastic try cutting the top off a plastic trash
bag.
This ring of plastic drapes and adheres nicely to and over the rim of the
platter leaving the center of the plate open for drying.
Works great for me.
Gayle Bair
Bainbridge Island, WA
http://claybair.com
-----Original Message-----
Jennifer F Boyer
Try cutting long strips of saran wrap and draping just the rim
during drying. This allows the bottom to dry out and strengthen
before the rim starts shrinking and pulling up on the bottom.
Jennfier
Craig Clark wrote:
>
> You may be trimming then to thin. Alternatively, it could be the fault
> of the clay body. What type of white stoneware are you using? Is it a
> particularly "tight" body? If it is then you may need to try out a
different
> one for your larger platters.It doesn't sound like you're drying them to
> quickly.
> Craig Dunn Clark
> 619 East 11 1/2 st
> Houston, Texas 77008
> (713)861-2083
> mudman@hal-pc.org
>
> ----- Original Message -----
Kat in the Hat"
> Hello All:
> My platters spin like a top because the centres have warped outward and
now
> they no longer sit on the foot ring. So what am I doing wrong?
Earl Brunner on tue 19 mar 02
I agree with this, dry the bottom first, I think some times even bottom cracks
are caused by the rim drying first and making the bottom shrink "out" to it.
Jennifer F Boyer wrote:
> Try cutting long strips of saran wrap and draping just the rim
> during drying. This allows the bottom to dry out and strengthen
> before the rim starts shrinking and pulling up on the bottom.
> Jennfier
>
--
Earl Brunner
http://coyote.accessnv.com/bruec
mailto:bruec@anv.net
Ron Roy on wed 20 mar 02
Hi Kat,
The short answer is make your foot rings taller.
Some potters leave a button or ring - unglazed - to stop the bottoms from
touching the shelf but that is about glaze firing and I think you are
having the problem during drying.
All rounded bottoms move as the clay drys - some times they come up instead
of down and that is a major mistake.
The bigger the plate the more the bottoms move -particularly if the bottoms
dry after the sides - so dry em slower and get the clay as evenly dried as
possible before turning the foot - and make the feet tall enough to allow
for some movement. Just a matter of getting used to the clay you are using
- it may even have a high shrinkage and that makes the problem harder to
deal with.
RR
>My platters spin like a top because the centres have warped outward and
>now they no longer sit on the foot ring. So what am I doing wrong?
>The platters are about 18" wide, thrown (on plaster batts) with a white
>stoneware, compressed, compressed and compressed. I cover them up right
>away, with a light polyester cloth and then plastic. Let dry out for
>about 4 days. Then trim them with a foot. ( I don't use a chuck for
>trimming)
>Place them on newspaper, on the rims (upside down) and re-cover them with
>a light dry cleaners plastic. In a couple days they are dried with no
>cracks but the centres have bowed out so much that the platters rock on
>the centre.
>Oh I have looked in the archives (maybe not in the right place) but I
>could not find anything preciously dealing with this problems. Hummmmm.
>You may be saying "Silly Girl it is uneven drying" I have thought about
>that but don't know how to get around even drying. I dry slow, soooo what
>else should I do? Platter experts help me!
>
>Kat
Ron Roy
RR# 4
15084 Little Lake Rd..
Brighton,
Ontario, Canada
KOK 1H0
Residence 613-475-9544
Fax 613-475-3513
WHC228@AOL.COM on wed 20 mar 02
Another drying trick to keep the platters and plates from rocking or being
"spinners" is to cot a small piece of packing foam [about 1/8" thick] and put
it under the plate while it is drying.
Bill
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