I've been experiencing this for a few times now. On some feature films the white levels seem to bee pulled down a bit.
They look very muted due to this.
Here are some examples from the movies 'Prisoners' (2013) and 'Jacobs Ladder' (1990):
While looking at the frames of 'Prisoners', you can clearly see, that even the brightest, blown-out highlights (muzzle flash, windows, etc.) aren't at 100 IRE.
They fall at 80-90% most of the times.
Whereas on the other hand 'Jacobs Ladder' (1990) has got its white levels at proper 100%.
Is there a technical or artistic reasong behind this?
And during wich production state is this happening? Whilst shooting, in the DI, during DCP export?