Digital BW, The Print

>>Does it make any sense to use a flatbed scanner like the Epson 3200 as a
densitometer ?  In other words, print out your grayscale step wedge, then
scan it in and look at the grayscale values in Photoshop?<<

The following that was posted on the Epson 3200/2450 user's group at yahoo
might give you some insight:

The following article describes the limitations of the 2450 as a
densitometer (I assume the 3200 has similar characteristics since they are
so similar):

"Using the Epson Perfection 2450 Scanner as a Densitometer with Vuescan
software"
by Alan Mynett

http://homepage.ntlworld.com/a.mynett/ep2450/2450densi.htm