My stock rodinal turned brown. I opened it just a week ago. Why is this, and is it a bad sign?
Nicholai
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My stock rodinal turned brown. I opened it just a week ago. Why is this, and is it a bad sign?
Nicholai
Rodinal will turn brown very quickly but this will not affect it's working properties. However I don't like using a chemical that appears to have gone off so what I do is decant the 500cc bottle into 5 x 100cc glass bottles (or the equivalent) and use one at a time. I don't know where you will get them where you, are but my local pharmacy will sell them very cheaply once you explain what they are for.
I also use them to preserve RA4 Developer and Paper developer which I make up or buy in large quantities. This stops the chemical from deteriorating. Plastic will absorb oxygen over time and this is what 'kills' the developers. Glass is a far better alternative.
I've used Rodinal that has gone inky black and was likely over 20 years old with seemingly no difference I could tell. No worries.
Haha, thats great to hear. Thanks! :D
Rodinal will last decades even when turned brown. I heard from somewhere they found some in a WWII bunker that was over 50 years old and it still worked!
Rodinal will keep well but once mixed has to be used instantly as it goes off quickly
As jm94 said, Rodinal concentrate lasts for decades, even in partially-used bottles.
Discoloration, even if severe, does not affect its performance.
Once mixed, it should be used within about 15 minutes. I always mix it while the film is in the pre-soak.
I've been using Rodinal for over 50 years (not the same bottle) and have never experienced any variation in performance with age.
- Leigh
That's taking stand processing to extremes!Quote:
Originally Posted by Leigh B
Steve.
I can't stand stand processing. It's the most ridiculous concept ever developed.
- Leigh
It has its merits, but i think thats out of the topic ;)
Nicholai
I'm pretty sure there's a pun standing around in there somewhere. ;)Quote:
Originally Posted by Leigh B
FWIW, I've never used Rodinal (or R09, for that matter) that wasn't brown. Isn't it supposed to be brown?