|This photo belongs to iquebalsun on deviantART|
There are not that many different UV absorbers used in nail polish - the only ones I know of are Benzophenone-1, Benzophenone-3, Benzophenone-4, and etocrylene. Those UV absorbers are used to protect polish from yellowing due to ultraviolet rays; however, I also wonder if they might have another use. UV absorbers are used in plastic to prevent the plastic from aging and becoming brittle due to ultraviolet rays - in fact, benzophenones are used for this purpose in PVC plastic. I'm inclined to think that benzophenones might also increase durability in nail polish, especially since nail polish contains plasticizers. This is just conjecture on my part, but I think it's an interesting possibility. If you know anything about it, please leave a comment.
Aaaand here's the recap:
- UV absorbers are chemicals that absorb ultraviolet rays.
- Benzophenone-1, Benzophenone-3, Benzophenone-4, and etocrylene are UV absorbers used in nail polish.
- UV absorbers help keep nail polish from yellowing and, possibly, increase the wear time of polish.