Quote Originally Posted by dnmilikan
The net result of this chemical reaction is lengthening the effective life of the fixer solution. This chemical reaction will continue so long as there is either the Sodium Sulfite or the Sodium Bisulfite present in solution for the free sulphur to recombine with.
So the Sulfite has no real benefit for the fixing process itself? I am about to exclude the Sulfite and use a fixer consiting of Thiosulfite only as a one-shot (one-session) fixer for paper.