flatbed scanner (G4050) emulsion up or face down?

[LotusEsp]

Hi
I have an HP G4050 scanner and it comes with a 4x5 adapter. I'm going to try out using that, plus dry & then wet mounting it directly onto the scanner glass.

But is there convention on whether the emulsion side of the film should be face down or face up?

thanks

[mdarnton]

I put it face down to help avoid newton rings.