I have been scanning a large bunch of my sheet film negatives over the past few days. It has given me a chance to look at them carefully again. One of the things I noted was the quality of those developed in the original Pyrocat-HD. The negatives were developed at various times in the past 15 years in various developers, including (but probably not limited to) D-76, HC-110, Rodinal, and Pyrocat-HD. The visual appearance of the Pyrocat negatives (easily identified by the stain, as well, in most cases, by notes) is truly superior. They also scan extraordinarily well. There are a couple of things that I can not explain. Perhaps someone can. The first one the Pyrocat stain. It seems to increase with time. Does it stabilize after a few months? (It seems to, but I'm not sure.) Is there any problem with this? The other thing I notices is that the negatives developed in Pyrocat seem to be free from development irregularities. Some times, because of the different agitation characteristics of the tanks, I get small irregularities in the image due to different amounts of development in various areas. Not anything big or that can't be handled pretty easily, but irregularities anyway. Does this have something to do with the dynamic characteristics of the development process in Pyrocat? Or is there some other reason, or am I just imagining things? In any case, I will have to mix up some more Pyrocat-HD. Merry Christmas.