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cracking bottoms

updated mon 4 nov 02

 

Lily Krakowski on fri 1 nov 02


Like someone else said this morning I think that the sudden appearance of
cracks in your platters is linked to the change in seasons. I do not know
what is going on in your studio but I would guess that somehow your platters
are drying faster, or with more air current.

As was discussed in an earlier thread about this problem, heaters stir up
the air in a room. Your heat source may not have a fan, but still it will
create air movement, which may cause enough of a "draft" to affect the
drying of your plates.

My own great love is liquid latex or wax. Try coating the bottom part that
is up with either, and see what happens later. I use latex on spouts and
handles etc when I fear that that part will dry too fast in relation to the
pot.

The rims of footed platters do put stress on the bottoms. Possibly, just
possibly supporting the rims fully (rolled up and taped newspaper) while
they are drying right side up may help....




Lili Krakowski
P.O. Box #1
Constableville, N.Y.
(315) 942-5916/ 397-2389

Be of good courage....

Steve Dalton on sun 3 nov 02


> The rims of footed platters do put stress on the bottoms. Possibly, just
> possibly supporting the rims fully (rolled up and taped newspaper) while
> they are drying right side up may help..
>
> Lili Krakowski


I am coming in late on this, so I don't know if this has already been said.
Here is my expierence with cracking bottoms in plates/platters and what I
was taught in college. Wider forms with low walls do have a tendacy to
crack more than a taller narrow form.

I compress the snot out of wider forms. After you 'open' the form and
before you 'pull' the wall, you use your wooden rib and run back and forth
several times. Going in, you compress and going out you smooth. Also, if
you wedge your clay, wedge one direction then the next and when you place
your clay down onto the wheel have the direction of the wedge facing out as
opposed up.
--
Steve Dalton
Clear Creek Pottery
Snohomish, Wa
www.clearcreekpottery.com
sdpotter@gte.net