Steve Anchell lists a couple of PPD formulas in his film developing cookbook. The claim, according to Anchell, for PPD is exceptionally fine grain. I tried one of the formulas from his book; I don't recall which, off the top of my head, but it might have been Edwal 12; whatever it was, it had PPD and glycin. How was it? Okay. Not great and not bad.(posted 8245 days ago)Jorge and I have batted around the idea of using PPD in some of my other homebrews, but never really investigated anything in depth. I did try it in one of my catechol formulas and was not pleased with the results. Basically, I just think there are better ingredients out there that are not so toxic. In fact, I wonder if 777's no longer on the market because of the toxicity of PPD? To my knowledge, there is no commercially offered formula which does employ PPD. I think, however, Kodak uses a less toxic derivative in their color negative chemistry.
Anyway, Harvey's 777 does sound interesting, so if anyone finds the formula, I'd like to try it just for kicks.