Quote Originally Posted by markbarendt View Post
Well we need to remember that lightness and saturation are not the same. A thicker negative simply prints lighter at a given enlarger exposure than a thinner one.

So, extra exposure of the film requires a corresponding eNlarger exposure change to place the main subject at the same brightness on the paper. As long as the print is coming from the straight line of the neg there will be little if any difference for the main subject on negs that are exposed several stops differently.

What extra film exposure can do on C-41 film is give us better shadow color and tone separation by getting them up onto the straight line. Better shadow color can easily be viewed as providing a better/more saturated photo.

Extra exposure reduces graininess too.

Given the really long straight line available on C-41, some extra exposure has little if any downside.

Extra exposure increases graininess, try it some time. You can end up with a thin image (read: thin image) where minimum image density is close to max.

Better shadows does not equal more saturation. You are compromising saturation above mid tones, and the tones above mid tones get compressed.

The colour separation gets smaller and smaller on the negative the more above mid tones you go.

Try shooting a sunset some time, and expose the sunset colours as mid tones, then expose for the shadows on the foreground and see where you get.