Taylor Hendrix on wed 23 may 07
If you're going to lay in a premade slab then yes, you'll get a groove
where the slab settles into the foot ring. I know a
thrower/handbuilder who pushes the extra clay into that groove,
forcing the slab into the foot ring then smooths out the inside of the
plate etc. with no problem. If throwing into this mold, you should
have no problem indeed. Squishy clay will smoth out with fingers or a
rib.
I have only had hump molds. I then threw foot rings onto the piece
right after forming. Man, but you have to remove the piece before it
shrinks too much and cracks all to heck.
Taylor, in Rockport
On 5/23/07, Fred Parker wrote:
...
> My question is how to make a mold with a shallow footring. It seems if I
> make a slump mold of the plate bottom with the footring, the ring will
> telegraph through the clay slab, leaving a circular grove around the
> plate's surface. If I make a hump mold for the top (inside) plate
> surface, there's no ring on the bottom.
...
Fred Parker on wed 23 may 07
I want to make a plaster mold that I can use for dinner plates. I need
help. I have no experience with plaster beyond pouring some into a
cardboard box to make a drying bat for recycling.
My question is how to make a mold with a shallow footring. It seems if I
make a slump mold of the plate bottom with the footring, the ring will
telegraph through the clay slab, leaving a circular grove around the
plate's surface. If I make a hump mold for the top (inside) plate
surface, there's no ring on the bottom.
If anyone has advice, I would really appreciate it.
Thanks,
Fred Parker
Terrance Lazaroff on wed 23 may 07
Fred;
I have always found that when making hump or slump mould plates that there
was some degree of warping. No matter how hard I tried this problem would
return. I think that is why industry press moulds. If warping does not
bother you then I would go with a slump mould with out a foot ring. When
the plate is firm enough you could place a coil and throw the foot ring.
My suggestion is to get some good large plaster wheel bats and learn to
throw a good plate. If you have access to Robbin Hoppers Functional
Pottery, you will find that he gives a good table of weights and measures
for basic production pottery on page 156. If you use the weights suggested
it will take a bit of practice but you will get better results.
Terrance.
Fred Parker on thu 24 may 07
Terrance:
Thanks for your comments. You might assume I know more than I actually do
here, but I need a bit of clarification: do I place the coil on the
plate's bottom and shape it there, or is there another way?
Thanks,
Fred
On Wed, 23 May 2007 13:10:53 -0500, Terrance Lazaroff
wrote:
>SNIP
>
>If warping does not
>bother you then I would go with a slump mould with out a foot ring. When
>the plate is firm enough you could place a coil and throw the foot ring.
John Sankey on thu 24 may 07
I went for throwing then trimming with a template. See
http://sankey.ws/pottery.html
Lois Ruben Aronow on thu 24 may 07
Just out of curiosity, it sounds to me like you are generally a thrower.
Why wouldn't you throw a plate? It's so much faster that casting them,
unless you are using industrial gang molds.
Just curious.
...Lo
Who makes way too many plates and loves it
**********
Lois Aronow Ceramics
Brooklyn, NY
www.loisaronow.com
www.craftsofthedamned.blogspot.com
> -----Original Message-----
> From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of
> Fred Parker
> Sent: Thursday, May 24, 2007 9:22 AM
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: Plate molds
>
> Terrance:
>
> Thanks for your comments. You might assume I know more than
> I actually do here, but I need a bit of clarification: do I
> place the coil on the plate's bottom and shape it there, or
> is there another way?
>
> Thanks,
>
> Fred
>
>
> On Wed, 23 May 2007 13:10:53 -0500, Terrance Lazaroff
> wrote:
>
> >SNIP
> >
> >If warping does not
> >bother you then I would go with a slump mould with out a foot ring.
> >When the plate is firm enough you could place a coil and
> throw the foot ring.
>
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