FX-39, the duck's guts...
No both Pyrocatechin (Pyrocatechol) and Pyrogallol can be used in Pyro type developers in the same way as Phenidone or Dimezone or their close derivatives are used in PQ (Phenidone/Hydroquinone) developers.
The confusion is the term Pyro is used in general for staining developers containing either developing agent while the abbreviation is used in specific formulae for Pyrogallol.
Ian
I'm a newbie to developing but will chime in anyway.
I use the Arista brand film developer $1641, a small bottle costs $5 and will last me between 4-6 months. It works very well for my needs, but then again, at this point in the game, I'm just happy if an image shows up. It's not that bad, but I have been developing my hobby for 2 years and developing for 18 months, and one of the many pieces of advice given on here to newbies is to use one developer and stick with it until you know everything about it, then start to branch out. Ok, lecture off, lol

My benchmark is ID-11/D76 or XTOL, both diluted 1+1.
However, for the last year I've been very pleased with TMY-2, exposed around EI250 and developed in Perceptol, diluted 1+2 at 24 degrees Celsius...a tip I got from a Barry Thornton book. This is as close to a magic bullet I've been able to get
One thing I've never tried is using ID-11/XTOL stock. Somewhere on the web I read that FP4+ dev'd in ID-11 stock is significantly less grainy compared to 1+1. That's something I'd like to test myself (in 35mm).
d76,what else?

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