Less than 15% of the 92 million tons of clothing and other textiles discarded annually are recycled—in part because they are so difficult to sort. Woven-in labels made with inexpensive photonic fibers, developed by a University of Michigan-led team, could change that.
Click here for original story, Photonic fibers borrow from butterfly wings to enable invisible, indelible sorting labels
Source: Phys.org