New wristband warns when you've been been in the sun too long: paper bracelet printed with light sensitive ink signals UV exposure to wearer with smiley and frowny face symbols [misc]

Beauty Tips For Body Care
https://www.theguardian.com/science/2018/sep/25/new-wristband-warns-when-youve-been-been-in-the-sun-too-long
Girls Blog 2015
Submitted by sharknado1234