Recently, I have gathered equipment for enlarging and is ready to start. I want to get my printing process standardize somehow that I can save time/cost in processing my prints. Here is my though: 1. Buy a Stouffer Transmission Projection Step Wedge and then use it with my Ilford EM10 and Durst 605 for calibrating my film processing, i.e. EI and development time. 2. Use the Step Wedge to calibrate the EM10. 3. Use the same equipment for determine the standard print time for Ilford VC paper for maximum black, esp. for 5x7 and 8x10 paper sizes. (Ralph Lambrecht plots the EM10 graph similarly, right?) Hopefully, I can determine: (i) EI and N development time for individual film (ii) Calibrate the EM10 that the corresponding film density for each EM10 number is known. (iii) Standard printing time for commonly used print sizes 5x7 and 8x10 are known (iv) determine the filter grade for a given film with a contrast range measured by the EM10 exposure monitor I have everything standby me except the Step Wedge. There are other Stouffer products, does the one mentioned above suit my need? Should I opt for a 21-steps or (EM10 not sensitive enough for) a 31-steps one? Calibrated one? Please feel free to comments and share your experience on calibrating your printing process, in particular if you use similar equipment.