LilaG writes "Forget gold-plated teeth. Gold-nanoparticled hair may just be the next cool thing. Researchers in Paris have discovered that they can produce gold nanoparticles within strands of hair that will dye white hair gold. Added bonus: the hair glows red when blue light shines on it.
Alas, don't expect to see gold nanoparticle dye coming to your hair salon anytime soon. The process takes days of treatment to produce the full effect. Another downside: the process uses a very strong base, with pH 12.5, making it far more caustic than a perm."