Can I just use sodium sulfite as a wash aid? I have over a pound of the stuff left over when I used it to clear Polaroid type 55 negs.
Using a plain sodium sulfite bath as a wash aid may cause a problem with hard water. A scum of calcium sulfite may form on prints and film. It would be best to include 5 g/l of a chelating agent such as EDTA or Calgon in the bath.