I take it back then .. I didn't know this....so if I tried to sepia tone a print, and bleached and toned it in the dark, I would end up with no image? Or if I develop a black and white print, then bleach and redevelop in the dark, I would end up with no image? How do you "oxidize" the silver as well as re-halogenating? Does bleaching in CuCl oxidize as well as bleach?

Could this be done to remove base fog from film/paper? Say you had 400 ISO film with some fog. Could you develop and bleach it, and would the unexposed emulsion retain its former speed, and the rehalogenated base fog would no longer be fog, but a halide with very low speed?

I have some 1950's Ilford HP3 with so much fog that this would make an interesting experiment.

Interesting.