Hank Murrow on mon 22 jul 02
>Antoinette Badenhorst wrote;
>
> Hi everyone. If I read in books about polished porcelain,
>what do they mean.
>My logics(if I have any)tells me that the piece will be bisque fired and
>then(maybe wet....?) sanded before firing to ^10. Or would they fire it to
>^10 and then maybe use something else to sand with. Does anyone knows the
>process?
>Just curious.
Dear Antoinette;
I see someone has covered this subject re dolls, so I will
share about high-fired porcelain and stoneware. I use medium grit
alumina oxide wet/dry paper to polish the bottoms of all my pieces,
but sometimes I want to really polish the unglazed clay to a high
sheen. For this, I use two Merit flap wheels (hundreds of pieces of
emery paper mounted on a wheel) of 8" diameter and 2" wide mounted on
each end of a Baldor grinding motor. 120 grit and 325 grit. The
finished piece has the look of marble, depending on the body.
Stoneware looks like terrazzo. Got to be careful ,as high heat can
leave marks from the resins which bind the emery to the paper. You
can even profile the wheels with a piece of SiC kiln shelf to fit
certain shapes. The footrings on my plates are glassy smooth, which
feels great in soapy dishwater and they never mark fine furniture.
Do not know if this is what you are after, but someone else
may find it useful.
Cheers, Hank in Eugene
Pat Southwood on mon 22 jul 02
Maybe burnished, ???? leave raw clay untill leatherhard then polish with a
metal spoon or sympathetically shaped stone until shiny. Bisque and ideally
smoke fire, as burnished ware has compacted the particles so that they wont
absorb a glaze .Stay Centered. Pat.
----- Original Message -----
From:
To:
Sent: Monday, July 22, 2002 2:00 PM
Subject: Polishing porcelain.
> Hi everyone. If I read in books about polished porcelain, what do they
mean.
> My logics(if I have any)tells me that the piece will be bisque fired and
> then(maybe wet....?) sanded before firing to ^10. Or would they fire it to
> ^10 and then maybe use something else to sand with. Does anyone knows the
> process?
> Just curious.
> Thanks.
> Antoinette.
>
> Antoinette Badenhorst
> http://hometown.aol.com/timakia
> 105 Westwood circle
> Saltillo, MS
> 38866
>
>
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Timakia@AOL.COM on mon 22 jul 02
Hi everyone. If I read in books about polished porcelain, what do they mean.
My logics(if I have any)tells me that the piece will be bisque fired and
then(maybe wet....?) sanded before firing to ^10. Or would they fire it to
^10 and then maybe use something else to sand with. Does anyone knows the
process?
Just curious.
Thanks.
Antoinette.
Antoinette Badenhorst
http://hometown.aol.com/timakia
105 Westwood circle
Saltillo, MS
38866
Longtin, Jeff on mon 22 jul 02
Hey Antoinette,
Polishing porcelain is very common among porcelain doll makers. (I think
they call it polishing.)
They, however, don't fire to typical bisque, cone 04 or 06, rather they fire
to 018 and them polish the piece with emery cloth and a little water. They
then may re-bisque to cone 04/06 and then glaze fire to cone 6.
They fire to 018 to take the resulting silica dust out of the "danger zone",
i.e. unfired clay dust equals raw silca dust.
On the doll haeds I've seen it makes for quite a nice shiny surface.
Take care
Jeff Longtin
Complex Mold Made Easy
-----Original Message-----
From: Timakia@AOL.COM [mailto:Timakia@AOL.COM]
Sent: Monday, July 22, 2002 8:00 AM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Polishing porcelain.
Hi everyone. If I read in books about polished porcelain, what do they mean.
My logics(if I have any)tells me that the piece will be bisque fired and
then(maybe wet....?) sanded before firing to ^10. Or would they fire it to
^10 and then maybe use something else to sand with. Does anyone knows the
process?
Just curious.
Thanks.
Antoinette.
Antoinette Badenhorst
http://hometown.aol.com/timakia
105 Westwood circle
Saltillo, MS
38866
____________________________________________________________________________
__
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.
David Hendley on tue 23 jul 02
Jason Briggs, the Studio Resident at the Appalachian Center,
spends weeks working on a single piece of porcelain sculpture.
He sands portions of the porcelain after cone 10 firing by using
the same process as jewelers, going from 240, to 400, to 600
grit emery paper. Some pieces are sanded with 1500 sandpaper,
resulting in a surface that is unbelievably smooth and absolutely
impossible not to rub.
David Hendley
Maydelle, Texas
hendley@tyler.net
http://www.farmpots.com
----- Original Message -----
> Hi everyone. If I read in books about polished porcelain, what do they
mean.
> My logics(if I have any)tells me that the piece will be bisque fired and
> then(maybe wet....?) sanded before firing to ^10. Or would they fire it to
> ^10 and then maybe use something else to sand with. Does anyone knows the
> process?
> Just curious.
> Thanks.
> Antoinette.
>
> Antoinette Badenhorst
> http://hometown.aol.com/timakia
> 105 Westwood circle
> Saltillo, MS
> 38866
>
Timakia@AOL.COM on tue 23 jul 02
Thanks for the info Jeff, Hank. I am not sure if I will ever use that. It
sounds like the kind of thing that I might do once for the experience and
then never again. Interesting though, how I do not have trouble burnishing
some of my pieces till they are so smooth that one have difficulty to hold
them.
Another thing that I realized once again, is that there are always something
to learn from a different(?) craft.
Good day for you.
Antoinette Badenhorst
http://hometown.aol.com/timakia
105 Westwood circle
Saltillo, MS
38866
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