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Jeff,
Also, don't forget to santize everything prior to it coming into contact
with the crystals or the distilled water. At one point one of our people
was wondering why the tank kept "crashing" every couple of weeks and it was
because she didn't decontaminate the funnel she used.
Now, if you aren't agitating the water, then the crystal solution will fall
out of the water, but it can be agitated and mixed back into the water as
long as you use sanitary non-metal instruments. I've often wondered if we
could keep the solution in the liquid longer if we switched away from water
and towards the base of the Kalliroscope solution (I once knew what that
was, but alas it slips my mind at the moment). I've also found the people
at Kalliroscope to be very helpful. (They also thought my idea might be
neat to try, but I have yet to try it).
-William
William Katzman [log in to unmask]
Director of Exhibits (828) 322-8169 x307
Catawba Science Center (828) 322-1585 (fax)
"Try not to become a man of success, but rather to become a man of value"
-A. Einstein
-----Original Message-----
From: bruce quast [mailto:[log in to unmask]]
Sent: Saturday, September 30, 2006 1:12 PM
Subject: Re: rheoscopic fluid problem
ISEN-ASTC-L is a service of the Association of Science-Technology Centers
Incorporated, a worldwide network of science museums and related
institutions.
****************************************************************************
*
On 9/29/06 2:44 PM, "jeff courtman" <[log in to unmask]> wrote:
> ISEN-ASTC-L is a service of the Association of Science-Technology
> Centers Incorporated, a worldwide network of science museums and related
institutions.
> **********************************************************************
> *******
>
> we've been using rheoscopic fluid from Kalliroscope. our fluid seems
> to settle out, sometimes in as little as 12 hours. sometimes it will
> stay in solution for several days, unagitated.
>
> we've been told precipitation could be do to water contamination
> (bacterial?).
>
> any insight, comments, alternate source material, etc. would be
appreciated.
>
> Jeff Courtman
> Exhibits & Special Projects Coordinator
> 251.208.6851
> Exploreum Science Center
> www.exploreum.net <http://www.exploreum.net/>
>
>
> **********************************************************************
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I suggest filling the exhibit with a bleach water mixture, let it pump thru
for several hours (if this exhibit uses a pump), drain, rinse, & refill with
clean water, let that pump thru, drain & refill with distilled water &
rheoscopic fluid & bacterial stabilizer. Make sure there's no metal contact
with the fluid.
This procedure has worked well for us in our flow tunnel exhibit.
Good luck!
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