Laurie Force on sun 3 aug 97
If PAM works well for releasing clay, can you use it to release from
rubber molds, too?
Laurie in Grand Junction
Unruly JuliE on sun 3 aug 97
I have been told to use only "alcohol free" cooking sprays to release
clay from molds. I have used "Weight Watchers" as it has none. It
works fine for me on plastic hump molds, but there is not a lot of fine
detail and them either. That might pose a problem with the build up of
bubbles from the cooking spray in the fine detailed areas.
JuliE
Jonathan Kaplan on mon 4 aug 97
>----------------------------Original message----------------------------
>If PAM works well for releasing clay, can you use it to release from
>rubber molds, too?
>
>Laurie in Grand Junction
Most rubber moldmaking compounds in the urethane variety, the silicone
variety, etc., usually contain some sort of parting compound in its
chemistry, and any further use of parting comounds is usually not needed.
What is needed is what we refer to as "mold dressing." This is an aqueous
solution, purchased as a concentrate which needs to be diluted. This
preparation functions not only as a surfectant, but also keeps the
opmnipresent plaster "scum" from appearing and building up on the rubber
molds. We use a 20-3o gallon container with this solution to clean our
rubber molds before each plaster casting. Also, we have a small spray
bottle to slightly wet the mold prior to casting.
Jonathan
Jonathan Kaplan, president jonathan@csn.net
Ceramic Design Group Ltd./Production Services
PO Box 775112
Steamboat Springs CO 80477
Plant Location (please use this address for all UPS shipments)
30800 Moffat Ave Unit 13
Steamboat Springs CO 80487
(970) 879-9139*voice and fax
http://www.craftweb.com/org/jkaplan/cdg.shtml
http://digitalfire.com/education/articles/kaplan1.htm
Darrol Shillingburg on mon 4 aug 97
> ----------------------------Original message----------------------------
> If PAM works well for releasing clay, can you use it to release from
> rubber molds, too?
>
Hi Laurie,
I've done some mold making and casting in natural history museum work and
think you would have difficulty with Pam/rubber molds and clay. Try a dry
separator like wood ash or corn starch. I use Pam as a separator when
making plaster molds but never when press molding clay into the mold. As
the clay dries it shrinks away from the plaster surface and releases easily
when dry enough.
Good luck,
Darrol in Elephant Butte, NM
----------
>
> Laurie in Grand Junction
Andrew Conley on mon 4 aug 97
The potters in my studio use PAM for everything. They also use
vaseline. If you use PAM, be careful to not spray it over the floor-it
gets very slippery!
Laurie Force wrote:
>
> ----------------------------Original message----------------------------
> If PAM works well for releasing clay, can you use it to release from
> rubber molds, too?
>
> Laurie in Grand Junction
Carl meigs on tue 5 aug 97
At 09:02 AM 8/4/97 EDT, you wrote:
>----------------------------Original message----------------------------
>The potters in my studio use PAM for everything. They also use
>vaseline. If you use PAM, be careful to not spray it over the floor-it
>gets very slippery!
>
>
>
>Laurie Force wrote:
>>
>> ----------------------------Original message----------------------------
>> If PAM works well for releasing clay, can you use it to release from
>> rubber molds, too?
>>
>> Laurie in Grand Junction
>
>Be sure to clean the mold after. Ants love to gather. Imagine a face
mask with eyeholes filled with ants. Gross. It happened in Hawaii.
meigs@neca.com
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