CP Dunbar on sun 6 jul 97
When glaze runs off of the side of a pot, sometimes it appears
that it could be ground off to save a pot. What type of grinder
works well w/ glaze. Is there a Sears model or whatever easily
purchased? Also what type of grinder head is needed?
cp
--
"And she shall have music wherever my Lady goes."
cpdunbar@concentric.net
Jim Duffy on mon 7 jul 97
I have worked in the past with crystaline glazes, wich are noted for
their fluidity. A Sears grinder will work just fine for occasional
mishaps. The finer the grit of the stone the better. I used a medium
grit to take off the bulk of the material and a fine grit to finish to
foot.
Unless the glaze is perfectly clear, you will expose bubbles in the
glaze by grinding. This is a flaw on your finish. I used to make a
disposable stand for every piece glazed with crystaline glazes. The
stand would be glued to the foot of the pot with a paste of Elmer's glue
and silica. Since there was very little contact between the two, they
seperated with a chisel without damage. The glaze was thin compared to
most and ground smooth with minimal evidence.
CP Dunbar wrote:
> ----------------------------Original
> message----------------------------
> When glaze runs off of the side of a pot, sometimes it appears
> that it could be ground off to save a pot. What type of grinder
> works well w/ glaze. Is there a Sears model or whatever easily
> purchased? Also what type of grinder head is needed?
>
> cp
> --
> "And she shall have music wherever my Lady goes."
>
> cpdunbar@concentric.net
Ken Russell on tue 8 jul 97
>>Is there a Sears model or whatever easily
>>purchased? Also what type of grinder head is needed?
CP, I got a Black & Decker from the local hardware store for around fifty
bucks. It has two grinding wheels (one on each side). There's a wheel for
major chunks and one for finer grinding. I have it mounted on a table and
it works like a champ. I am thinking about moving up to a Binford Super
Ultra Grinder with a 454 fuel injected hemi engine for more power. Urrgghh,
urrgh.
Ken Russell
The Arlington Pottery
gone2pot@iw.net
Talbott on tue 8 jul 97
For really professional results use a water cooled/lubricated
motorized grinding wheel.... Check out Woodworkers Warehouse
(Trend-Lines)... they do or at least did carry this type of equipment...
Marshall
1ST ANNUAL CLAYARTERS' GALLERY - NAPLES, MAINE (Summer 1997)
http://fmc.utm.edu/~dmcbeth/cag/naples.htm
Celia & Marshall Talbott, Pottery By Celia, Route 114, P O Box 4116,
Naples, Maine 04055-4116,(207)693-6100 voice and fax,(call first)
WBS Live Chat Room, Sat Nites 10 PM EDT, Private Room: Clayarters
E-MAIL: clupus@ime.net
howard axner on tue 8 jul 97
CP Dunbar... in response to your question about grinders to take glaze runs
off the bottoms of pots...
Most grinder machines will work equally well, but the type of grinding
wheel that you use can make a big difference. I beleive that the most
common type of wheels are made from Silica Carbide. Although these will
grind the glaze down, and often work well, they also create enormous heat
at the point of contact. This heat can cause the glaze to chunk away
rather than grind away. Another type of grinding wheel is called a Green
Wheel. I do not know what it is made of but it is actually light green in
color. It cuts through glaze like butter and it does not heat up like
other more common grinding wheels, resulting in a much higher success rate.
We carry the Green Wheel at Axner but I am certain they are also available
elsewhere. Howard Axner
Robert Compton on mon 14 jul 97
I've read the comments about grinders ans was surprized no one
mentioned the belt covered rubber grinding wheel made by Creative
Industries. It is an 8 inch diameter wheel, with a soft outter rim of
rubber that a 3inch wide silicon carbide ( like sandpaper ) belt fits
over. It will fit the arbor on the stone grinders that have been
mentioned so far. The beauty of it is that it will not chip the bottom
of pots the way hard wheels do, and unlike the "green" wheel it is very
suitable for polishing the whole bottom of a rough pot. We use it on all
our stoneware pots to give the bottoms a glassly smooth polished bottom.
We do not use it on our salt or wood fired pots, except to clean
up a glaze drip ( since we want to preserve the flashing on the
underside).
I can't say enough about this grinder. We make about 2000 pieces
a year that get a quick polish before they are sent to market, and it
stops the dilemia of your pot scratching someones expensive table.
Bob
--
Robert Compton Phone: 802-453-3778
3600 Rt 116 http://homepages.together.net/~rcompton
Bristol, Vermont 05443 rcompton@together.net
Karen R. Betts on tue 15 jul 97
On Mon, 14 Jul 1997, Robert Compton wrote:
> ----------------------------Original message----------------------------
> I've read the comments about grinders ans was surprized no one
> mentioned the belt covered rubber grinding wheel made by Creative
> Industries. It is an 8 inch diameter wheel, with a soft outter rim of
> rubber that a 3inch wide silicon carbide ( like sandpaper ) belt fits
> over. It will fit the arbor on the stone grinders that have been
> mentioned so far. The beauty of it is that it will not chip the bottom
> of pots the way hard wheels do, and unlike the "green" wheel it is very
> suitable for polishing the whole bottom of a rough pot. We use it on all
> our stoneware pots to give the bottoms a glassly smooth polished bottom.
> We do not use it on our salt or wood fired pots, except to clean
> up a glaze drip ( since we want to preserve the flashing on the
> underside).
>
> I can't say enough about this grinder. We make about 2000 pieces
> a year that get a quick polish before they are sent to market, and it
> stops the dilemia of your pot scratching someones expensive table.
>
> Bob
>
> --
> Robert Compton Phone: 802-453-3778
> 3600 Rt 116 http://homepages.together.net/~rcompton
> Bristol, Vermont 05443 rcompton@together.net
-----------------------------------------------------------------------------
Robert,
This rubber wheel over the grinder head sounds like a good idea...For pots
that are not too big, or not too drippy with glaze can be ground with a
good old fashioned Dremel-type tool. They even have diamond-tipped
cone-shaped sanding/drilling bits that will grind through the hardest of
glazes. Of course, eye protection is always a must in these situations. I
wish our school lab would get one of those rubber wheel things, tho, for
the bigger pots...The hard grinders are the PITS.
Karen Betts
Ceramics student at the university of Florida
afn29587@afn.org>
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