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MAKE pal Rob writes – “Ran across this while looking for something else- it’s from a 1937 Popular Science article on fun with luminous chemistry.
Basically, the idea is that one funnel has a solution of luminol and sodium hydroxide in water, and the other funnel has a solution of pottasium ferricyanide and hydrogen peroxide in water. I remember seeing articles about this sort of thing as kid and wishing I could get my hands on some of those chemicals. Doing a quick google, it seems that luminol is used by detectives to detect blood, and you can buy it on the internet. “
[via] – Link.

Related:

  • MAKE Halloween projects – Link.
  • MAKE Halloween archives – Link.

  • RobCruickshank

    Here’s a page about playing with lumniol:
    http://ian-albert.com/misc/luminol.php
    Careful with that razor, if you want to play CSI!

  • Shadyman

    pottasium ferricyanide

    Did you mean: potassium ferricyanide

  • RobCruickshank

    Oh, probably, yes.