And one more thing. If you buy the WinPlotter program it comes on a disk with testing by Phil Davis of hundreds of film/developer combinations that you can apply immediately. You may have to calibrate the data to your working conditions but in most cases the results that you and I would get from testing a film and develper are very similar so if you develop your film for the condtions described your results should be very similar.

Unfortunately the film testing data provided by Davis is primarily for regular silver gelatin printing and is of limited use for alternative printing. And very few if any of his tests were made with pyro staining developers. But for that there are quite a number of photograhers using pyro staining developers who can provide useful data.

Sandy