Below is a link to a 1979 Popular Photography Article authored by Bob Schwalberg 32 years ago. http://forum.mflenses.com/1979-pop-photo-rodinal-article-t37502.html This article was reference in the recent post, How To Get the Most Out of Rodinal. This classic article gives the photographer a range of options related to light, film, dilution, and enlarger light source. It also gives handy dilution procedures. I found the suggested developing times for FP4 and Tri-X to be more than a good starting point. My only disagreement concerns box speed. Tri-X at EI 200 and FP-4 at EI 64 or 80 is a better place to start for shadow detail. Thanks to the fellow who scanned this. This type of information is getting lost.