You should consider using a common laser dye from Kodak or Exciton. Dyes
such as Fluorescein can be rendered highly visible by causing them to
fluoresce under appropriate spectral illumination. Probably the best however
is a solution of Rhodamine 6G, which is highly visible in colour (but stains
everything, and should not come into contact with skin), and dissolves in
many solvents such as benzene, iso-propanol, methanol and xylene.

Karl.



-----Original Message-----
From: mems-mgr@ISI.EDU [mailto:mems-mgr@ISI.EDU]On Behalf Of Sung Jin
Sent: Wednesday, March 10, 1999 7:20 AM
To: MEMS@ISI.EDU
Subject: Coloured or fluorescent liquids for microfluidics?


Dear MEMS community,

I would like to test a microfluidic device.  For this I would
like to render the fluid very visible, to a camera, like many
famous pictures of coloured or fluorescent liquid in capillaries.

My problem is that I do not know what kind of liquid does that.
If anybody knows the answer, please help me.
I would appreciate knowing the commercial name of the agent,
and if there is any special procedures to use it (is it mixed
in water?  or alcohol?).

Thank you very much!

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