If I may quote, "Pyro produces stronger and more consistent edge effects than any other known developer. Edge effects give a print a delicate "etched" look that has a tactile three-dimensional feel". Book of Pyro pp.10, if you get this book and read it you will understand a lot more about pyro than most of the photographer's out there. There are a few of us who work with it and love it, the others just like to talk about what they think it does. Regards, Pat(posted 8950 days ago)