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Old 03-28-2013   #24
tsiklonaut
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Join Date: Dec 2012
Location: Estonia
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Quote:
Originally Posted by shadowfox View Post
That is unbelievable!
Lith developer in working solution expires in a matter of days.
How can a concentrate stay active that long?

And your print is a strong contribution to this thread.
Thank you!

Indeed I was surprised myself. I believe the A & B concentrates themselves are quite neutral and chemically relatively "inactive", only when mixed together they become an "explosive" mix. The Lith-solution dies (oxydizes-) out within a hour or so in my darkroom.

I do use Tetenal Anti-Oxydant spray before I close the concentration bottles - maybe this is also the trick of this longetivity since the Liht bottles were well over half-empty for 6+ years.


Two more from this series:


Take care,
Margus
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