Tonight I tried printing with Form Labs Clear Resin. At 100 micron X, Y, Z resolution the exposure time is in minutes, not seconds. It is also very thick, somewhere between Makerjuice and corn syrup. It was a bit hard to get the bubbles out from under the build plate, I had to raise and lower the build plate several times.
I made a simple staircase model so that I could test exposure times of 15, 12, 10, 8, and 6 seconds to measure the light bleed vs exposure time (each step on the staircase is 0.1mm). Sorry for the poor layout of the drawing, I was in a hurry. 
This is what I tried printing:
The attachment plate exposure time was 150 seconds and is the only part of the print that actually cured. It didn’t cure to full solid, though — it was clear and very flexible, like a strip of that clear thin flexible vinyl:
The resin is so thick that even for the layers that didn’t cure the build plate sucks the vat up as it raises, and the vat gets pulled higher than any resin I’ve tested so far. I had to set the lift height to 10-12mm so that the vat would drop back down.
I am currently trying the print where each layer has 200 seconds to cure. I would have liked to try increasingly long cure times for each step on the model, but the model is 11mm tall and the Kudo software says it’ll take 7 hours and 20 minutes to print and I won’t be able to babysit the printer tomorrow – it has to be done by 7:30 AM.
For everyday printing, I wouldn’t use this resin. HOWEVER, the long exposure time compared to faster curing formulas may make it easier to find a sweet spot that minimizes light bleed while still curing the resin, especially if you are printing at higher resolution. So if you absolutely need high resolution clear parts, maybe this resin is a candidate. I’ll post the results of the overnight test in a day or two when I get a chance.
