"Darcy's" Harborlite Perlite

[barleywhiner]

Hey everybody,
Harborlite gives "Darcy's" as the unit for porosity of their perlite. I am sure that this is in reference to Darcy's law. But does anyone know if/how Darcy's can be translated to microns?
Thanks,
Jeff Erway
La Cumbre Brewing Co.

[Pompeiisneaks]

I Googled and got this:

http://answers.yahoo.com/question/in...2125230AANqjCc which

refers back to this:

http://en.wikipedia.org/wiki/Darcy

I hope this is accurate, because sometimes wikipedia isn't as perfect as you'd think...