I am obsessive about making all my chems. Ian steered me on to a homebrew bersion of Rodinal which I call Ianol. I have made two versions with different pH. The lower hydroxide version is the one I use and it's excellent at 1+50, jobo agitation @68 deg. The higher pH version is extremely close to Rodinal. I've used two gallns of the stuff so far...at 1+50!!


I have made the quantity as follows because I can get the potassium sulphite in a 1 liter bottle and make a complete batch..

Ianol:
Higher pH
p-Aminophenol.(free base) ................... 53 g-----58g new recipe
Potassium sulphite 45% sol...................... 1L
Potassium Hydroxide ........................... 54 g------59g new recipe
Potassium Bromide ............................. 13 g
Benzotriazole 1% ............................... 13 ml
Water to make .................................. 1.3 L

Stock pH 13.2