ferricyanide bleach shelf life

Discussion in 'Darkroom Developing and Printing' started by Alex Tutubalin, Jan 15, 2004.

  1. Hello,

    how long mixed (but not used) ferricyanide bleach
    can be stored on shelf?
    Alex Tutubalin, Jan 15, 2004
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  2. Until it turns green. If it is reducing bleach (Farmer's Reducer - a
    mixture of P. ferricyanide and thiosulfate) then it usually goes in
    a 1/2 hour.

    Ferricyanide in pure water with no air in the bottle should last
    years and years.
    Nicholas O. Lindan, Jan 15, 2004
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  3. Nicholas,

    thanks for answer.

    Nicholas O. Lindan
    It is ferricyanide C41-bleach (potassium ferricyanide + potassium bromide)
    So, because of no redox potential of potassium bromide, I can
    expect long shelf life of this kind of bleach ? I use distilled
    water (with membrane distiller) and Jobo compressable bottles.
    Alex Tutubalin, Jan 16, 2004
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