Your working procedures sound fine, but the developer is not working now, even though it worked fine the first time you used it. I am not able to figure out what happened, but I know for a fact that the stock solutions of this developer, if mixed correctly, do not spontaneously go bad. For one of them to go bad, it must have been somehow contaminated. Perhaps that was done by PF, perhaps by you, or perhaps there is some other way it was contaminated. But if it is not working now it must have somehow been contaminated. I have on hand at this time more than eight different Pyrocat-MC kits, all at least two years old, and two dating from 2006. Two were mixed by PF (the oldest ones) and six by me. All have been used to develop film, and all still work.
It should be noted that one of the reasons Pyrocat-MC (and HD) give such good accutance is because the formula is finely formulated to use as little reducer as possible, and the pH of the working solution is also carefully balanced. For this reason even small quantities of another chemical can easily contaminate the working solution. Even left over fixer in a Jobo drum has been known to ruin a working solution. It is harder to contaminate the stock solutions, but many people have managed to do that also.
I hope you figure out what is going on but from where I stand it looks to me like your stock solutions are contaminated. One thing you might do, if you have either a pH meter or pH strips, is measure the pH of a working solution. It should be around pH 11.0, ranging from 10.8-11.4. If you are way out of that range you would not get full development.
Sandy King
Bookmarks