Date: Thu, 1 Feb 2007 13:54:53 -0500
From: "Les Lamborn" <llamborn-AT-rbc.org>
To: <puptcrit-AT-lists.driftline.org>
Subject: Re: [Puptcrit] Testing for sulphur in oil-basd clays?


Mathieu
  You can use sulfur based clay but you will need a sealer spray.  The following 2 sites answer you question. Email or call one of the suppliers of your silicone rubber and ask them how to deal with sulfur based clay.  They are there to help you.
http://www.smoothon.com/FAQ/cure_inhibition.htm  or http://tb.smodev.com/tb/uploads/Dragon_Skin.pdf 
If you want non-sulfur clay try "Kleen Clay" or Alumilite sells a non-sulfur clay.
  Les in Grand Rapids (Snowing and cold)

-----Original Message-----
From: puptcrit-bounces-AT-lists.driftline.org [mailto:puptcrit-bounces-AT-lists.driftline.org] On Behalf Of Mathieu René
Sent: Monday, January 01, 2007 5:27 AM
To: puptcrit-AT-lists.driftline.org; PuppetCafe-AT-yahoogroups.com
Subject: [Puptcrit] Testing for sulphur in oil-basd clays?



We know silicone HATES sulphur, even in tiny quantities. It might not even set if there is a trace, I've read.
I've been using the cheap kid's clay called Giotto Pongo, and my collegue thinks it might have sulphur in it.
I wonder why a kid's clay would have that, and what the purpose of sulphur would be in a clay...

Is there an easy and very quick way to test for sulphur in an oil-based clay?

I have thought of pouring a drop of mixed silicone onto a piece, and seeing if it hardens as it should.
Are there other better ways that would tell us without needing the help of a chemical analysis lab?

Or is there a way to bypass the problem by using a sealer of some sort?


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