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Great stuff. Here's another home experiment: disappearing ink.

http://blog.jgc.org/2012/03/fun-with-phenolphthalein.html



Worth noting; phenolphthalein is a powerful laxative. Wash your hands carefully.


We used phph all the time in chem classes...funny no one ever mentioned that. Though with a group of high school students, perhaps it was for the better. Nice to know, thanks.




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