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Hi Mario,
There are several vendors who provide rheoscopic fluid.  The only problems I ever encountered were (1) eventual settling of particles, and (2)nasty stuff in the fluid - we used it to demonstrate fluid dynamics and kids were supposed to use a stick to drag small plastic fish through it, but inevitably they would drop the sticks and get their hands in it.  It got pretty gross, so we had to change it fairly frequently, and eventually we just stopped doing the demo.
Beryl

-----Original Message-----
>From: Mario Martinez <[log in to unmask]>
>Sent: Jan 28, 2009 6:29 PM
>To: [log in to unmask]
>Subject: RV: Turbulence liquid formula
>
>ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>Incorporated, a worldwide network of science museums and related institutions.
>*****************************************************************************
>
>Hello everybody.
> 
>We at Planetario Alfa in Monterrey Mexico, want to fabricate a
>Turbulence Table or a Sphere. Does somebody know the formula to prepare
>the liquid inside this kind of exhibits? I will thank this information,
>and any other tip that may help us to make a good exhibit.   Thanks in
>advance for your help. 
> 
>Mario Martinez
>Exhibits and Projects Manager
>Centro de Ciencias y Artes, A.C.
>Phone: (81) 8303-0006
>Fax: (81) 8303-0015
>[log in to unmask]
> 
><http://www.planetarioalfa.org.mx/>  
>
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