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Stands for polymethylpentene. It’s just a common type of plastic polymer that allows gas exchange.
The thin sheets can be used to substitute for a porous egg shell, which is what allows the chick to breathe while developing in the egg.

When it comes to making the impossible happen . These girls seem to have the knack for doing it. I either don't have the patience or the gift not sure which . But this thread is well worth the time spent reading it . Btw I had to look pmp sheet upWhich is why it is good for shelless incubation.
I know now what it is didn't before .I found that on amazon . it sells in various thicknesses .Thanks.I am So sorry that he didn't make it!
In case you want to see the brother:I am So sorry that he didn't make it!
