I have had similar issues with black and white resin and another person on the forum has the same issues. Because we all have similar problems around the same time I’m starting to think this is a software related issue or something?
See the thread of jbrown:
I had exactly the same problems with black but also white resin two weeks ago! This was after a 4 week holiday so I concluded it had something to do with the Resin sitting on the shelf for some time but now I see this I start to think it has something to do with updated software of the printer or PreForm? I know I updated the printer software right after the holiday.
And my thread:
This is “normal” with Black, it’s the pigments setting at the bottom of the tank. When I was still using Black I had to spend at least 30min stirring the resin in the tank to get a decent homogeneity unless I was using the resin at least every couple of days in which case 5 min was enough. I can’t even imagine the amount of settling that is going on in the cartridges, and I also did spend a long time before each print thoroughly shaking the cartridges.
Due to this issue and maybe others I have…
Maybe Formlabs can respond to this??