Last weedend I shot tulips - 8 sheets of PN55 and saved the negs - dumped them in Sodium Sulfite bath. I then shot a bunch of FP4 - same set-up - Pyro - etc. I had heard that the PN55 was very fine grain - It was no finer than the FP4 in Pyro - Of course it is probably a bad test - I bought the film on e-bay - It is well over 15 years expired! Still - The images were good enough to deserve a fair amount of darkroom time. -Frank