gentlemen, here is Alex's reply to the question. It follows along with my experience also.

Alex Hawley sent this in a PM "Probably won't get to today; I'm squeezing this off at work and I have a dinner to go to tonight.

But, in essence, leaving out the pyrogallol does not affect contrast. In fact, catechol is known for producing higher contrast. The biggest effects I've seen in leaving out the pyrogallol is (1) It becomes a neutral-tone developer vice a very warm-tone developer, and (2) Tray life is much longer. Pyrogallol oxidizes quickly. I've had solutions using catechol only stay active for two weeks if bottled between printing sessions.

Lee, please go ahead and post this in the thread if you like.


also yes the citric acid improves the keeping properties also.