Salons of the future: New hair coloring technique etches patterns in your hair
 

Changing your hair color is easy enough: you can dye it, bleach it or rub some hair chalk on it. If you ask a research team from The University of New Mexico, though, they'll tell you that to get any hair color that remains as vivid as the day you...

http://www.engadget.com/2014/08/02/h...=rss_truncated