How do hollywood cinematographers expose for skin tones using false color?

[Petr Kvapil]

I read that skin tones should fall in the 70 IRE, but it seems in movies they are darker. So what are the usual numbers? Thank you for any tips.

[David Mullen ASC]

There is no rule because people in scenes don’t always stand in a “normal” light level depending on their position relative to the source plus depending on the mood of the scene. Plus skin tones are not the same for everyone.