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This article, from the British Interactive Group website is relevant:
http://www.big.uk.com/knowledgebase/exhibits/flow_pattern_exhibits.htm

Since the report and your manufacturer disagree, maybe you could do a test
with a small amount?

Out of my own curiosity--have you (or anyone else on the list) found other
cool uses for rheoscopic fluid? Or other exhibits that call attention to
flow?


>ISEN-ASTC-L is a service of the Association of Science-Technology Centers
>Incorporated, a worldwide network of science museums and related institutions.
>*****************************************************************************
>
>Hello,
>   We have columns of water with rheostatic fluid in them where air
>bubbles up from the bottom- the bubbles push the water around and you
>can see the swirls.  We've had problems with the breakdown of the
>rheostatic fluid even after using a bacterial inhibitor and the
>resulting sludge clogs the air lines.  The rheostatic company suggested
>silicon oil instead of water.  Has anyone used such a thing?  Would a
>switch over eliminate the problem?  Any other creative suggestions or
>other liquid ideas?
>
>Thanks, Jay
>
>--
>Jay Higgins
>Program/Exhibit Developer
>Providence Children's Museum
>100 South Street
>Providence, RI 02903
>401.273.5437 x137
>
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  Kay Ziff
  Exhibit Developer

  Bay Area Discovery Museum
  557 McReynolds Road
  Sausalito, Ca 94965
  Phone:  415/339-3922

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