Digital BW, The Print

Forgive me if some of these questions are redundant but:

1) Has anyone taken a densitometer and measure the base reflection densities of all the common papers?
2) Has anyone printed the cone (or other) wedge and done the same thing?
3) Am I correct in assuming that sensitometric techniques can be used to characterize all of these "green" issues? I understand that different lighting conditions can cause color shifts especially in certain organic pigments but this can also been seen by a color densitometer. 

Thanks!

Brian



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