How a Pen Becomes a Tattoo 🖊️

Why does pen ink wash off but a tattoo lasts forever? 🖊️➡️💉
The top of your skin is dead cells that flake away, so a tattoo needle pushes the ink deeper, into the living dermis. Your immune cells try to eat the ink, but they can’t break it down, so they just hold on to it for life.
And the first electric tattoo machine? Thomas Edison’s electric pen, rebuilt by tattoo artist Samuel O’Reilly in 1891.

#shorts #tattoo #howitworks #science #skin #edison #thanksdave

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