My attachments got attached to the end of the superadditivity thread started some time ago by PE. My bad. You can see them there.
Originally Posted by craigclu
I like the results very well. Metol-ascorbate has a little advantage over phenidone-ascorbate in that Metol has more tanning action. The relief effect seems to make edges a little different due to the diffraction. I have done essentially this same thing using phenidone, but cannot dissolve 0.05 moles of it. 0.01 moles, 1.62 grams, of phenidone substituted for the Metol is quite potent, however. Only half the hydroxide is required since phenidone has no attached acid molecule.