Ron, the RAF formula is almost exactly the same proportions of p-Aminophenol to sulphite & hydroxide as the Andresen 1900's version allowing for the conversion of the metabisulphite with the hydroxide.
It's essentially the same formula so it's unlikely the organic anti-foggant is particularly special, and the bromide level's only around 0.77%, So the only significant difference is the free base rather than the hydrochloride.
I have had correspondence now with Dr Schneour but he's unable to comment on whether he thinks the free base or hydrochloride form is correct.
Interestingly in the Agfa officially published formulae of 1903-1910 that I've looked at Rodinal is always referred to as a Paramidophenol developer (of an alkali salt) and their others as Paramidophenol Hydrochloride-Hydroquinone Developer and the 3 or 4 sources I have all say the same.
Last edited by Ian Grant; 08-28-2009 at 02:05 PM. Click to view previous post history.