The colors are added in, of course, with it being an electron microscope image. Another picture:

  • stebo@lemmy.dbzer0.com
    7·
    12 hours ago

    for this magnification it is actually pretty smooth

    source: I have used an SEM at my university and never saw something this smooth even at higher magnifications

    of course I didn’t look at medical tools but this shows that they are crafted very precisely