How do I know if prints are cured enough?

I am printing dental models as well as crowns and copings in castable resin. How do I know if the prints are cured long enough? I have had some rings split when burning out to cast, I use dental investment materials and all the ones on this site seem to be geared towards jewelry. Advise or information would be appreciated.

Some of the recent comments on this thread should be helpful! Casting jewellery

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