Thank you, and I will look it up.Good morning.
I believe the answer for all eggs not just Silkies is 12-14%. Please confirm this yourself though as it has been a while since I did that research.
Here is my very favorite hatching resource...
Now you will be the one answering all the hatching questions!
I hatched probably 100 or so Silkie chicks this past year. They were treated and hatched in the same fashion as EVERY other egg or breed. Humidity kept around 40-45 days 1-18 worked perfectly well. I never weighed them or marked air cells except right before lock down to ensure the lowest point was facing up.