Sodium sulfite precipitate

Discussion in 'Darkroom Developing and Printing' started by David Nebenzahl, Jan 13, 2010.

  1. Nothing earthshaking, just interesting.

    I keep a bottle of sodium sulfite concentrate that I use for hypo
    clearing agent. Checked the bottle yesterday and was surprised to find
    big chunks in the bottom. *Really* big chunks. I guess they're big
    Na2SO3 crystals. They're clear, like ice, not like salt. They're hard.
    One was so big I had to shake and break it to get it out of the bottle.

    They all redissolved easily after heating in a pan on the stove.
    David Nebenzahl, Jan 13, 2010
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  2. I guess it's time to toss that batch and mix some fresh. So what is the
    effect of sodium sulFATE on film and paper, if any?
    David Nebenzahl, Jan 15, 2010
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