George, I've used it extensively over the past year as a single bath developer with lovely results on 4x5 and 120 Delta 100, 120 SFX200, 35mm Kodak IR and Delta 400. You get a good stain on Delta 100 and the gradation and sharpness are excellent. However I do find its not as fine grain as PMK Pyro. Regards,(posted 8512 days ago)