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Hi Mario,
 Over the years here in Boston we've had several exhibits using a 
rheoscopic fluids and have always used Kalliroscope Corp. 
www.kalliroscope.com <http://www.kalliroscope.com>. Of our 2 current 
exhibits one is a sealed horizontal table top exhibit using straight 
fluid and haven't had to service it in over 20 years. Our other is a 
hands on Stream Table using a very diluted mixture of 1 oz. of fluid for 
every gallon of water. As others have point out, the particles tend to 
settle and the nozzles feeding the stream have a tendency to clogged so 
we have to service this unit weekly. The up side is that Kalliroscope is 
nontoxic and allows visitors to put their hands in the water and 
manipulate the current. A bacterial stabilizer, available through the 
company, is recommended if you something like this.

Hope this helps,
Dan MacDonald
Manager, Exhibit Maintenance
Museum of Science, Boston

Mario Martinez wrote:
> 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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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.

Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.

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