The character is determined primarily by the inherent properties of the emulsion layer(s). The shape of the characteristic curve and spectral sensitivity determine tone reproduction. The image structure characteristics are determined by the type, shape and size of the silver halide grains, the various dyes added (sensitvity, acutance, anti-halation), turbidity etc. Depending on the mix of all these things, different developers can have different effects.
Originally Posted by Arctic amateur
So, to do what you are trying to do, you would develop all the films to the same contrast (measured either by CI or other gradient methods) in a developer such as D-76 either at stock strength or 1+1 dilution. To be accurate about contrast you'd need to generate characteristic curves.
The curves for the films under these processing conditions would also be important (in my opinion) because they can help explain why you're seeing what you're seeing in the side by side tests with actual photographs - at least in terms of tone reproduction. Of course, only general conclusions can be drawn, especially since a characteristic curve can be generated in so many different ways.
Start there, I guess. There are still many variables at work even when shooting the scene. So the conclusions you come to might only apply to your camera etc.
Last edited by Michael R 1974; 01-25-2013 at 10:18 AM. Click to view previous post history.