Through the wonders of chemistry, molecules can be rearranged to completely transform color. Erick Leite Bastos April 3, 2020 Blue dye from red beets – chemists devise a new pigment option Erick Leite Bastos, Universidade de São Paulo (USP) A simple chemical reaction turns the red pigment of beets into a new, nontoxic blue dye.
Symonenko Viktoriia/Shutterstock January 8, 2019 Hair dye is toxic – could natural alternatives be made to work? Madeleine Bussemaker, University of Surrey New research suggests ultrasound could make henna-based hair dyes more effective.
Subbing new risks for the current dyes’ dangers? Evgeny Savchenko/Shutterstock.com March 20, 2018 Eager to dye your hair with ‘nontoxic’ graphene nanoparticles? Not so fast! Andrew Maynard, Arizona State University Less-toxic hair dye would be a great invention. But discounting the risks that come with nanoparticles could undermine other efforts to protect human health and environmental from their effects.