McCrunchy Posted June 22, 2009 Share Posted June 22, 2009 Hello, I'm looking for a colourant that's soluble in water, is chemically mostly inert, and washes away easily. I just want to visualize some flows. I used to use KMnO4, but it is obviously not very inert, to say the least ... Thanks for your suggestions, McCrunchy Link to comment Share on other sites More sharing options...
UC Posted June 22, 2009 Share Posted June 22, 2009 i think sodium fluorescein is typically used for applications like this. Link to comment Share on other sites More sharing options...
insane_alien Posted June 22, 2009 Share Posted June 22, 2009 food colouring would probably work fine. Link to comment Share on other sites More sharing options...
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