The resin that I use with the highest"definition" is dental model.
Please see my previous post:
I am using the MODEL V2 for non dental work. It has a lot of filler in it to replicate the equivalent dental stone models.and it is quite durable and more resilient than the standard resins. It is very opaque due to the fillers and so there is very little light refraction/defraction of the laser beam.
Base on the papers that FL have published on this material ( https://formlabs.com/blog/creating-dental-model-resin/ 21) I took the plunge in using it and have never looked back. I think that due to its opacity it prints really fine detail and that is on a F2 at 31 and 35 degC.
It cuts nicely using fine fret saw Grade 2.0 size, and files down cleanly… It is flesh coloured for obvious reasons, but if you can overlook that it superb material.
Read the bumpf as it is the most thorough papers that FL have written on any of their resins.
I find that the dental resin is pretty stable and we make "precision prototypes with it. Like any of the resins post processing of cleaning, drying and heat curing with uv is also critical,
For example, we have found that with bulky thick parts slow warming and cooling is critical to prevent distortion and like wise with thin parts need very careful consideration on print orientation and support to prevent sagging