[pure-silver] Re: Amidol and oxidization
----- Original Message ----- From: Eric Nelson 
To: pure-silver@xxxxxxxxxxxxx
Sent: Saturday, May 23, 2009 2:51 PM
Subject: [pure-silver] Re: Amidol and oxidization
I'm sure I never added any citric and the activity dropped to practically 0 after X amount of time. I distinctly remember looking at pale under-developed prints in the tray and realizing it was time for the next batch of dev. to be made
I think I said acetic acid a couple of times. Of course it was citric acid I meant. Just hardening of the brain I guess. Amidol is known for dying in a relativly short time. It usually does not discolor as, say, Dektol, does so there is not much warning, it just gets weak. One would have to mix a tray full and then mix another a few hours later and compare the two for developing time and Dmax. I am a little sceptacle about the activity of Amidol which has turned black. Fresh Amidol is slightly gray. Again, one would have to make a direct comparison. It would be interesting to run these experiments because the results would lay the controverseys. Again, perhaps the Chamlees have already done this. 

--
Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx 
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