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Help locating a tracer for educational tool.

Srau2017 srau2017 at cs.com
Mon May 15 23:38:26 EST 2000

Hello to all.

I'm looking for a non-toxic /safe product to use to demonstrate
contaminantion/cross contamination for an educational purpose.  A "dye" or
something along that line that may be used to show students how easily it is to
spread microorganisms.  Again this product would be safe to use for adults. and
would not be visable to the naked eye without changing the lighting or
something along that course.  thank you in advance.

Shawn M. Rau
Enviro Team

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