David Hendley on wed 10 oct 07
Hi Gay, sorry that was confusing. I knew it wasn't too clear when
I wrote it, but I was in a rush (as usual 2 weeks before the
Texas Clay Festival).
My extruded footring plate is demonstrated in my video,
Volume I of the EXTRUDE IT! series, so a quick look at that
would be the best way to see what I do.
For others who don't have the DVD, here's a description:
When soft leather hard, the plate is centered upside down on a
bat on the wheel, and attached with 3 wads of clay. Excess clay
is trimmed off where the bottom meets the side.
The plate is scored and slipped for the extruded piece that
will become the footring. The D-shaped coil is extruded and
placed on the bottom of the plate, flat side down. Join the two
ends of the extrusion so it makes a continuous ring.
Start the wheel, wet the extrusion, and throw it - just a little,
push down to make sure it is attached and centered. Don't try
to make it perfect, just get it attached.
Remove the bat, with the plate still attached on it, and set it
aside to dry. In one-to-four hours (depending on drying conditions)
the ring will be leather hard. At that time, return the bat to the
wheel and trim the footring to its final size and shape.
There is no need to re-center the plate since it was left on the bat.
When making a whole set of plates the timing usually works out
about right, so that the first plate is ready for the final trimming
soon after the last plate has its footring attached.
The most common cause for an attached footring to crack is
adding a too-wet footring to a too-dry plate.
The operation is best done at the soft leather hard stage.
David Hendley
Maydelle, Texas
david(at)farmpots(dot)com
http://www.farmpots.com
----- Original Message -----
> When the plate is leather hard I
>>extrude a D-shaped coil, which is attached in a circle on the
>>bottom. This is set aside, still attached to its bat with 3 pads
>>of clay, to stiffen up for a couple of hours, and then the final
>>footring is trimmed from the added clay.
>>
> David, I am very interested in what you are describing but a bit confused.
> I
> don't understand the above piece. What is still attached to the bat?
> What
> are the 3 pads of clay?
>
> When I attached a ring of clay to the bottom of a plate it seemed to work
> fine until fired when the ring cracked in 2 places--as if it were not
> quite
> big enough around for the place it was attached to the plate. It did not
> show up until after the glaze firing.
> Moderator of the list is Mel Jacobson who may be reached at
> melpots2@visi.com
| |
|
