Dear Sung Jin,

You may want to try the following:

1       Fluoresceine - Which can be bought from most chemical supply
companies and is soluble in water and alcohol
2       Tartrazine - Same as fluoresceine
3       Go to your local foodstore and purchase some dye that would be used
for cooking and baking. We have used these dyes before and they are very
good. You can even get a selection of colours.

Hope this helps,

Coulton Legge

> -----Original Message-----
> From: Sung Jin [SMTP:siliconmad@hotmail.com]
> Sent: Wednesday, March 10, 1999 12:20 PM
> 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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