The word "500um" and a distance marker scratched into a translucent layer of blueish Sharpie marker. Photo is taken through a microscope.
https://mastodon.nzoss.nz/system/media_attachments/files/113/982/933/484/143/334/original/bec46fe233c3090b.jpg
Tiny things, 500μm = 0.5mm . I've got the #RepRapMicron #3Dprinter drawing things as a series of dots. This is a prelude to actually make the thing deposit resin into a recognisable solid form using #Prusa's PrusaSlicer and a filter to slice the object model. The (awful) #python code for the filter is here if anyone can stomach it https://github.com/VikOlliver/RepRapMicron/tree/main/gcode_segmentation
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