Quote Originally Posted by Michael R 1974 View Post
The exact formula for Microdol (Perceptol is assumed to be very similar if not identical) is proprietary, but is generally assumed to be:

5g/L Metol
100g/L Sodium Sulfite
~30g/L Sodium Chloride

Microdol-X contained at least one additional ingredient - an anti-silvering/anti-plating agent which may or may not improve sharpness by inhibiting physical development. The ingredient is a trade secret. Anchell/Troop guess at it being a relatively weak agent, while others claim it is a Mercaptan. Who knows? PE does. But he can't disclose it.

I can't help with your Autofine questions, other than to say it is unlikely Hydroquinone is the only developing agent unless it is a highly alkaline developer, otherwise it wouldn't work.
Interesting that Microdol-X's true formula is not available. It makes me wonder how Freestyle can in good conscience sell their knockoff, LegacyPro Mic-X as a replacement for Microdol-X.

Maybe they know something we don't? If they don't know the formula, how can they produce a substitute?