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A comment on Researchers solve mystery of odd behavior by droplets of food coloring (2015).

Re:Researchers solve mystery of odd behavior by droplets of ... by lolc on Friday November 20, 2020 @03:39AM (#25158500)
Brb buying propylene glycol!

Turns out there are vape-shops that sell the glycol, the water, and the paraphernalia to mix them! There is some food coloring left from the last party. Will have to source some glass plates still :-)

[ Parent | on HN ]
Re:Researchers solve mystery of odd behavior by droplets of ... by jcims on Friday November 20, 2020 @04:44AM (#25158889)
The pg is already in the food coloring. What you need are differential evaporation rates, so I would experiment with mixing water and/or alcohol with one color and then leave the other alone.
[ Parent | on HN ]
Re:Researchers solve mystery of odd behavior by droplets of ... by robk on Friday November 20, 2020 @02:00PM (#25163670)
You can do this with milk and liquid food coloring. Our kids do it at nursery school.
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