I think a staining developer is fine, we just finished two hundred plus rolls of trix, hp5 and tmax all developed in PMK , one of our standards , the other is D76.

I think Steve pointed this out, and I will defer to Ian to fill in the blanks on how it all works , but IMHO the most significant point about Pyro is it is a tannin developer. the hardening effect stops migration of the exposed silver which keeps our highlight detail very detailed.

I also agree that most if not all could not tell the difference between developers when the print is made, we are looking at f.dkfjds images and those who say they can tell developers used on prints, or film are funny people indeed and not to be trusted.