Comment by esseph | Hacker News Reader

Top New Best Ask Show Jobs

Comment by esseph | Hacker News Reader

Parent Full thread

After looking into this even more, there are two types:

Mineral - Reflects

Chemical - Absorbs

I thought so too but it's not the case. Even the mineral sunscreens mostly absorb.

https://cen.acs.org/business/consumer-products/What-in-sunsc...

Video with a UV camera is interesting: https://www.youtube.com/watch?v=E9tEEDpeJoo

Black means absorbed, of course.

And, omg, you can buy an active version on amazon, for this exact purpose: sunblock coverage check!

https://www.amazon.com/s?k=uv+mirror+for+sunscreen+test

Reply on news.ycombinator.com