Nancy and Jerry Jonnum on thu 6 nov 03
Katie Morris, ceramics instructor at Mendocino, (CA) Art Center recently
advised her students to use Pam spray on tile and sprig molds, including
on cottles and clay dams as a release agent. It works great!
Richard Aerni on fri 7 nov 03
On Thu, 6 Nov 2003 20:54:23 -0800, Nancy and Jerry Jonnum
wrote:
>Katie Morris, ceramics instructor at Mendocino, (CA) Art Center recently
>advised her students to use Pam spray on tile and sprig molds, including
>on cottles and clay dams as a release agent. It works great!
>
It may in the short run, but over time, I wonder if the oil (is it canola?)
wouldn't actually plug the pores of the plaster and make the release more
of a problem. I assume you are making these tile and sprig molds out of
Pottery Plaster #1?
When I and my partners were doing a lot of architectural tile work, making
bas relief tiles and sprig molds that were used in large scale
installations, we found, by trial and error, that the best release agent
was also the cheapest and simplest: We took old socks, filled them with
grog (like a rosen bag for a baseball pitcher) and tied them off. Prior to
putting the clay into the plaster mold, we'd gently tap the grog bag a few
times on the plaster, and the resultant dust insured quick and easy release
of the applied clay, without marring the surface of the clay.
Best,
Richard Aerni
Bloomfield, NY
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