Make Awesome Glowing Liquid at Home using the Insides of a Yellow Highlighter Pen!

This is so easy to do!

Extracting the fluorescent liquid from a highlighter pen to make glowing liquid is so easy for this amazing and cool science experiment. Yellow highlighter pens work best as they have a good quantity of fluorescein – the fluorescent chemical inside the cartridge.

We had a go at extracting fluorescein at home recently and we were amazed at how bright the fluorescent liquid was. The kids loved it, just pouring it into the containers was really satisfying. We wrote with it and drew pictures too, which looked awesome under UV light! As you can see from the video we made some mess, but it was easy to clean up and left no stains.  Fluorescein from these pens is safe to handle too.

Lets see how we did it and watch the video…..

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