File puptcrit/puptcrit.0607, message 102


Date: Fri, 07 Jul 2006 12:25:55 -0700
To: puptcrit-AT-lists.driftline.org
From: Steve Axtell <steve-AT-axtell.com>
Subject: Re: [Puptcrit] Molmaking question


We make moles with little beady eyes and latex tails..  : )
Ax


At 7/7/2006 09:21 AM, Mathieu René wrote:
>Hi Mike.
>Thanks for the answers, even if my question was a bit blurry.
>I am reccording the urethane baking trick. It might come in handy.
>
>
>The person says she uses rubber molds (I know, not very precise, but that's
>what i got).
>Her problem with the old molds that date abck when she was using silicone
>release agent, is that her Creative paperclay (a superfine paper mache type)
>gets "released from the mold too early in its drying stage, resulting in a
>warped mold.
>
>Here is the info I got from her:
>
>"I've been experimenting with paper slip casting in rubber molds, and my new
>molds which have never been treated hold the slip o so nice, and the older
>ones I've used silicone on release the cast too early, making it wrinkle and
>bubble from the lack of support as I add extra layers of slip."
>
>  Thanks for any pointers!
>
>
>
>
>Mathieu René Créaturiste
>Marionnettes, Masques, Etcetera...
>Puppets, Masks, Etcetera...
>www.creaturiste.com
>creaturiste-AT-magma.ca
>(514) 274-8027
>----- Original Message -----
>From: "Mike Brose" <propworks-AT-juno.com>
>To: <puptcrit-AT-lists.driftline.org>
>Sent: Friday, July 07, 2006 9:55 AM
>Subject: Re: [Puptcrit] Molmaking question
>
>
> > Mathieu............  we first need to know what type of mold?  Plaster?
> > Urethane rubber? Latex rubber? Silicone RTV? And what type of bad results
> > are they getting?  Need more to go on to be able to give a good answer on
> > this.
> >
> > Years ago, we used to use silicone based releases, but not anymore. We
> > like the wax based releases much better (we are primarily using silicone
> > molds however). We cast a lot of urethane resin in silicone RTV molds and
> > over time there is a chemical migration from the urethane into the
> > surface of the silicone molds which causes them to harden, get brittle
> > over many castings and eventually pieces tear out of the mold. To slow
> > that down, after 5-10 castings, we bake the molds (in a shop oven, not
> > the home oven!) at 200 degrees F. for several hours to bake out the
> > urethane residues. That helps tremendously. Between switching over to wax
> > based release and baking out the molds, we have pretty much doubled the
> > amount of pulls (castings) we can get out of one mold.
> >
> >
> > Mike Brose
> > www.puppetsandprops.com
> >
> >
> >
> > On Thu, 6 Jul 2006 17:51:55 -0400 =?Windows-1252?Q?Mathieu_René?=
> > <creaturiste-AT-magma.ca> writes:
> >> Hi all.
> >> A collegue is wondering what to do. She has made molds in the apst
> >> that used a silicone release agent. Thos old molds she still uses,
> >> but because of residues of release agent, she gets bad results.
> >> Is there a way (or ways) to clean silicone residues from a mold?
> >>
> >> Thankfully, her new molds don't use this kind of release agent
> >> anymore.
> >>
> >> I wll not let any silicone lubricant or release agent enter my
> >> studio!
> >>
> >> Mathieu René Créaturiste
> > _______________________________________________
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> >
>
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Steve Axtell
Axtell Expressions, Inc.
Website - http://www.axtell.com
New on DVD "AxTelevision"! - http://www.axtelevision.com
International Performer's Directory - http://www.axtell.com/ipd.html
Original contents =A9 2005 all rights reserved.  
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