Vic Harkness is a full-time Welsh student studying for a degree in AI and Robotics. She's also very much into 3D printers and she sells a variety of 3D printed products through her Etsy store. She says she recently had the opportunity to use a scanning electron microscope, so she decided to bring along samples of different plastic filaments that she uses for printing with her Lulzbot 3D printer. The results are very arty, and somewhat unexpected. You can read the whole story here: http://3dprint.com/66403/close-up-3d...ing-filaments/
Below is one of Harkness' ultra close-up images of NinjaFlex: