Lowest humidity for a total dry hatch?

[SweetieChicken234]

Can chicks hatch in the 40% range without getting shrink wrapped? Or does it need to be in the 50% range?

I'm talking about lockdown here. We are on day 18 tomorrow.

 

[Yardmom]

When dry "hatching" I still raise the humidity to 60 for lockdown. For my environment that is only a small surface area of water. I am not familiar with anyone keeping the humidity any lower than 60 for the actual hatch.