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Discussion in 'B&W: Film, Paper, Chemistry' started by Schlapp, Mar 3, 2009.
I have some Sepia by Speedbrew and was wondering how long the stuff will last as a stock solution ?
What are it's components? Is it a two part? Dan
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.
In the kit I have, the NaOH activator actually comes in a small plastic bottle, so it's probably not a problem.