Just about a week ago, I bought some resin that was expired. This particular stuff was Grey F100G, and had a LOT/Manufacture date of February 2014. So it expired about 15 months ago.
So after running a couple of tests, my prints would come out mushy or have parts that had failed altogether primarily because the supports were too soft and failed.
Then I had found a chart that someone posted with the laser exposure values for the different resins, so I though I’d try a higher exposure value. The default exposure value for Grey 01 is 118 (I assume it’s milliseconds), so I tried a couple of higher values. I found that when I print with Clear 02 (138), my prints come out near perfect.
So obviously this raises some questions:
is something others have found as well?
will the higher exposure do anything detrimental to the printer?
will the value have to be bumped up as the resin ages further?
what’s the oldest resin you’ve worked with?