Quote Originally Posted by Ian Grant View Post
Obviously quite different to D-512 which has a far higher proportion of Phenidone needed for a balanced Super-Additive effect, Pyrogallol was also used in developers as an oxygen scavenger.
The biggest difference between ID-4 and D-512 is not so much the different amount of Phenidone but the extra Carbonate that ID-4 adds. That extra Carbonate brings pH way up and likely changes the overall properties of this dev quite a bit. D-512 is very close to POTA ...