After that, I was able to continue to build the 3 models and 6 full print beds of parts by printing the same .form files repeatedly. I took a break for 1 week while busy at work but last night I got back to printing and loaded up and printed one of the same files.
To my dismay, many of the parts failed. Support structures were flimsy and broken, some parts did not print at all, some printed fine, but all of the parts felt very soft coming off the build platform and while removing them I found I could press into the bases as if the resin was not fully cured.
Upon post examination of the resin vat, I found that:
1) I now have 3 small sized fog spots (about 1cm x 1cm each) on the vat floor, where 3 of the failed parts were.
2) In some tiny places there were cloudier shaded resin wisps (hard to describe, more like spots than webs), that were pure liquid and when stirred up blended away.
I am curious if my 1 week wait had any effect on the resin, if I should have covered the printer in a black sheet or something else?
At any rate, after cleaning the vat and stirring up the resin I am reprinting the same batch of parts.
Here are some of the bad parts: