Thanks for your response, but basically I would expect that to lead to less dense negatives after reversal. That is in the original formula of course :-)2) Your film is very old, so there could be enough base fog in there that when you reverse process you get black.
Indeed, but the colour developer should act to competition (well, I did not let it complete well, since I was afraid not to have too dense negatives).3) You are not sure you had the right dilution of RA4 chemicals
I like the challenge and the process of searching and experimenting is more rewarding than the end result for me. I have enough fresh film, but I would like to make that one work too. Plus its base is too dense for a B&W negative (it seems to have an additional silver anti-haliation layer that only does away in the bleach).I would take your elderly film and use it for B&W negatives, buy modern film and chemistry for colour film and be done with it.