Sepia brew

Discussion in 'B&W: Film, Paper, Chemistry' started by Schlapp, Mar 3, 2009.

  1. Schlapp

    Schlapp Member

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    I have some Sepia by Speedbrew and was wondering how long the stuff will last as a stock solution ?
     
  2. dancqu

    dancqu Member

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    What are it's components? Is it a two part? Dan
     
  3. Rich Ullsmith

    Rich Ullsmith Member

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    I don't think it has a shelf life to speak of. I have never thrown any out due to lack of activity. Usually end up contaminating it or spilling it accidentally, or titrating it so many times I don't know what it is anymore.

    I have read that the NaOH activator will cause some problems in long terms storage in plastic bottles, but I have not seen that. Talking about two years here.
     
  4. jovo

    jovo Membership Council Council

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    In the kit I have, the NaOH activator actually comes in a small plastic bottle, so it's probably not a problem.