Why are tattoos permanent?

#141

Tattoos go back centuries across many cultures, and yet their chemistry is still an absolute mystery to most of us. How do tattoos work? What is the ink made of? How does the ink stay in our skin indefinitely? Why don't our bodies get rid of it? Let's do this.

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References from this episode

1. https://youtu.be/Fs9rR4W0EeA
2. https://www.washingtonpost.com/news/speaking-of-science/wp/2015/07/28/all-the-science-that-goes-into-a-single-tattoo/
3. https://www.washingtonpost.com/news/speaking-of-science/wp/2014/09/24/watching-a-tattoo-needle-in-slow-motion-reveals-the-physics-of-getting-inked/
4. https://www.acs.org/content/acs/en/education/resources/highschool/chemmatters/past-issues/archive-2012-2013/open-for-discussion-tattoos.html
5. https://cen.acs.org/articles/86/i2/Shocking-Tattoos.html
6. http://pubsapp.acs.org.libproxy.library.unt.edu/cen/whatstuff/85/8546sci4.html?
7. https://cen.acs.org/articles/91/i25/Chemistry-Tattoos.html
8. https://www.nature.com/articles/nri3920
   
   

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