[sanking]

Sandy,

How would you compare this developer from a results point of view compared to Pyrocat-HD?

Tom

In terms of image quality I have no idea at this time. I really don't expect image quality to be any better, but the fact that this is a one solution developer may appeal to some, and the stain of pyrogallol based developers offers a bit more highlight compensation than that of pyrocatechin based developers with VC silver gelatin papers. In that sense Pyro-Uno would be more a replacement for PMK or other pyrogallol based developers than Pyrocat.

I adjusted the formula so that the energy level of Pyro-Uno would be as close as possible to that of Pyrocat-HD, for two reasons. First, my belief is that if the energy level is approximately the same with a given type of development, given the fact that the reducer amount is very similar, I would expect fairly similar results in terms of grain and apparent sharpness. And 2), if time of development for a given average gradient is nearly identical this will make any comparisons of grain and sharpness very easy since I just expose and develop both developers the same way. The most important factor in making fair and objective comparisons of developers is to expose and develop so that both give the same density and contrast.

Sandy King