At this year’s UBC Chemistry Open House, “Chemistry Beyond the Magic”, I got to do a demo on UV-light, using majestic colour-changing beads and “secret marks” on dollar bills!

The beads change colour when exposed to UV-light, but change back to white when they’re not, while the old dollar bills have “secret marks” on them that only appear when under UV-light. 

Gotta love the magic of chemistry :)

Bonus Jonas: Kids got to make bracelets using the colour-changing beads to take home. I consider myself a kid, so I made myself one too.


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