Spot on Patrick, you understand what I'm getting at.
Originally Posted by gainer
It's the fact that the "potassium paraminophenolate" in a high concentration Potassium Sulphite solution has a pH of around 11.8 and when we have excess of hydroxide as in the more modern Rodinal formula we go to pH 14
pH 14 is in fact listed as being reached by 5.6% KOH solution, the MSDS's for A&O Rodinal show the KOH is only 2.7%. But 0.5% KOH is pH 13 and the Sulphite is pH 9-10 anyway so every thing there seems as expected.