Glass pens and glowing ink make for mesmerizing drawing videos

Originally published at: https://boingboing.net/2018/01/16/glass-pens-and-glowing-ink-mak.html

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is that glowing ink or is it fluorescent?

It glows under black light, so yes.

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Neat. I never got the hang of working with glass pens, nice to see that you actually can use them.

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