Treena Rinaldi on wed 16 jul 08
-----Original Message-----
From: Clayart [mailto:CLAYART@LSV.CERAMICS.ORG] On Behalf Of Jorge Nabel
Sent: Monday, July 14, 2008 6:42 PM
To: CLAYART@LSV.CERAMICS.ORG
Subject: Mold release for slabs
Hello Clayarters. Finally I've found a good reason to write again .
I make some of my work with slabs and put them mostly on melamine
plates or trays....
I've been using a mold release used for soap but was wondering if
polietilenglicol could
do the job. I bought it some time ago when it was suggested for throwing
water .
Has anyone experienced it?
By the way, after some years I've redone my site and wanted to invite
all to visit it.
All of my work is glazed? earthenware.
www.jorgenabel.com.ar
Hasta la proxima
Jorge en Buenos Aires
Jorge,
Your website is great, enjoyed it very much,?just want?to tell you the method we use at our? handbuilding class? for releasing clay from? plastic dishes and trays, most of which come?from the local dollar store. This? method was not discovered by me but, as usual, by one of my very inventive students.
Spray a little WD40 on the plastic mold, then smear it all around the surface, doesn't have to be a thick coat. Sprinkle baby powder fairly thickly all over that, and try to tap?the powder evenly around, just like greasing and flouring a cake pan. (you can use Pam instead of WD40, it will produce a rather moldy mold). Proceed ahead with your project. Your clay should pop out fairly easily, tho?the drying process?will take longer?than with other types of molds.?We had tried? WD40 by itself, and?baby powder by itself, but putting the two? together works better for us.
Regards,
Treena Rinaldi
Vienna, VA
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Kim Hohlmayer on fri 18 jul 08
Hi Treena,
I use similar methods for plastic, glass and smooth metal molds. However, I wonder, do you use corn starch baby powder or real talc talcum powder? I ask because if one is firing stoneware the talc can stain the ware. I don't know chemistry like Ivor, Ron Roy or any of our other esteemed clayart friends but I have been told that talc is a major component of low fire bodies. A friend used it as a white stain on dark stoneware beads when she was pregnant and didn't want to deal with anything remotely toxic. It looked very nice by the way. Anyway, that is why I ask.
Also, I just use cooking oil instead of any type of spray product. I wipe it on with a towl or sponge. It works quite well. --Kim H.
>
>
>
> Your website is great, enjoyed it very much,?just want?to
> tell you the method we use at our? handbuilding class? for
> releasing clay from? plastic dishes and trays, most of
> which come?from the local dollar store. This? method was
> not discovered by me but, as usual, by one of my very
> inventive students.
>
> Spray a little WD40 on the plastic mold, then smear it all
> around the surface, doesn't have to be a thick coat.
> Sprinkle baby powder fairly thickly all over that, and try
> to tap?the powder evenly around, just like greasing and
> flouring a cake pan. (you can use Pam instead of WD40, it
> will produce a rather moldy mold). Proceed ahead with your
> project. Your clay should pop out fairly easily, tho?the
> drying process?will take longer?than with other types of
> molds.?We had tried? WD40 by itself, and?baby powder by
> itself, but putting the two? together works better for us.
>
> Regards,
>
> Treena Rinaldi
> Vienna, VA
>
> ------------------------------
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