To: <puptcrit-AT-puptcrit.org>
Date: Tue, 13 Jan 2009 09:17:35 -0500
Subject: Re: [Puptcrit] woodcarving: carving facial features in what order?


i researched info about using the expanding foam into molds, and it's 
doable, but most sources said it was a bit of a guess work, if you work with 
the contrsuction grade stuff.
It expands too much, and can break your molds.
It can have irregular surface, due to air bubbles.
I'd use it for making armatures though.
If I had a proper studio setup for fumes.


Since then, at some colleague's studio, I tried a stiff Foam-it foam from 
Smooth-on, and it worked really well, straight into a one-part plaster mold, 
the first time I used it. I think the expansion was only twice the volume. 
It was only a test piece, so we didn't need to make a two-part mold.
We just broke the mold, once the foam had finished setting up.
So far, all the Smooth-On products I tried and seen tried were really 
reliable.








----- Original Message ----- 
From: <serendipity_puppets-AT-yahoo.co.uk>
To: <puptcrit-AT-puptcrit.org>
Sent: Tuesday, January 13, 2009 4:14 AM
Subject: Re: [Puptcrit] woodcarving: carving facial features in what order?


Mathieu...I was intrihued by something you mentioned in one of your postings 
recently.

Have you ever tried a two part mold and injected any of the expanding foam 
that builders use to insulate the gap between walls??
It's an idea I've considered but never tried.

I have some 'pattern makers foam' which is similar and was given to me by an 
engineer at Jaguar cars some while back. It's yellow and carves 
beautifully...a layer of cloth or paper over that is really quite good.
Cheers Charles
------Original Message------
From: Mathieu René
Sender: puptcrit-bounces-AT-puptcrit.org
To: puptcrit-AT-puptcrit.org
ReplyTo: puptcrit-AT-puptcrit.org
Sent: Jan 13, 2009 08:28
Subject: Re: [Puptcrit] woodcarving: carving facial features in what order?

Hi Charles.
Yeah, I remember you mentioning it in passing now.

Thanks for the precision.
Indeed, moldmaking in an excess of cold is bad for plaster, latex, and many
other materials, which just won't react as needed. Same for some varnishes,
so I don't take the chance anymore, and avoid using them in the winter if
they are toxic.
Plaster and latex are the rare exceptions I sometimes use in winter, if a
contract rides on it. Plaster dusts can be controlled. Latex fumes can be
evacuated with a powerful enough fan, and the use of a mask is a great
precaution.

I don't know what Jelutong is, so I guess I wasn't the one asking about it.
But now I'm curious of course.


_______________________________________________
List address: puptcrit-AT-puptcrit.org
Admin interface: http://lists.puptcrit.org/mailman/listinfo/puptcrit
Archives: http://www.driftline.org


------------------
_______________________________________________
List address: puptcrit-AT-puptcrit.org
Admin interface: http://lists.puptcrit.org/mailman/listinfo/puptcrit
Archives: http://www.driftline.org



-----



No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.176 / Virus Database: 270.10.6/1888 - Release Date: 1/12/2009 
7:04 AM

_______________________________________________
List address: puptcrit-AT-puptcrit.org
Admin interface: http://lists.puptcrit.org/mailman/listinfo/puptcrit
Archives: http://www.driftline.org