0.002" and 0.004" equate roughly to 50 and 100 microns. (0.050mm and 0.100mm)

DLP Stereolithography printers have been dipping below the 50 micron X-Y detail since 2012-2013.

My envisionTEC micro stated it's X-Y resolution at 39-31 microns and 25-micron Z layer height. For the prints I task it with, I've never found need to push and verify those limits.

My next addition was the B9 Creator v1.0 Kickstarter printer. It used a 1024x768 DLP projector and was configured to squeeze those pixels into an area that gave 50 micron detail. At the time, B9's Red resin was all there was and I had the time to see how far it could be pushed:

http://www.b9c.com/forum/viewtopic.p...tart=100#p5445

The community started to learn that pigment level in the resin could be used to fine-tune the amount of curing. Greater control meant higher detail.

When the B9 Creator v1.2 printer released with improvements and new features, it used an HD projector to squeeze 1920x1080 pixels into a region featuring 30 microns X-Y. Additionally, a Black resin became available. The model in this thread should demonstrate the crisp level of detail nicely:

http://www.b9c.com/forum/viewtopic.p...p=37940#p37940

I do recall someone printing an insanely small lattice structure. Not sure if the image is still on B9's social media feed.

One additional bonus with the higher-pigment black resin, things that took several hours on my v1.0 with the Red now prints in 15-20 minutes with my v1.2 machine.