An decent SLA 3d printer (which will be much more accurate than an FDM printer) can get down to feature sizes of 150 microns. A 300dpi paper printer is hitting about 85 microns, and that's not even a particularly high resolution printer.
Source on SLA printer feature size: https://formlabs.com/blog/3d-printer-resolution-meaning/
It'd be nice if there were open source printers. Somehow we have a few for 3D printers but not 2D printers, and it is annoying as hell.
It's because the printer heads are really hard to make, since the individual nozzles are so tiny.
An decent SLA 3d printer (which will be much more accurate than an FDM printer) can get down to feature sizes of 150 microns. A 300dpi paper printer is hitting about 85 microns, and that's not even a particularly high resolution printer.
Source on SLA printer feature size: https://formlabs.com/blog/3d-printer-resolution-meaning/