A couple of years ago I noticed pits on my glass slides after laser tattoo treatments. Under a microscope I could see ‘craters’ which had been formed by high speed ink fragments flying out of the skin.
But I also saw what I call ‘insects’:
I think these are melted portions of ink which has spread into the glass slide. Then I noticed that these ‘insects’ were deeper than the pit marks, which were all on the surface. The following video shows the change in focus between the surface crated and the deeper insects….
I will investigate these further….