In the excellent January/February 2006, View Camera Magazine article, A Simple Way to Test For Film Speed and Developing Time, Steve Simmons refers to a final step of building a scanning curve. This curve is then used to bring in your image as it proofed for you. Can anyone direct me to a web site or book which will instruct me on this? I think I understand what a film curve is, but am new to scanning and digital printing. Thanks