F-34

F-34

  1. nworth
    Water 700 ml
    Ammonium thiosulfate soln. (58%) 185 ml
    Sodium sulfite, anh. 10 g
    Sodium hydrogen sulfite 8.4 g
    Water to make 1 l

    PH = 6.5 at 27C; density = 1.086

    I believe a fixer should be slightly acid for decent longevity in use, but...
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