Richard--

Thanks a million. I'm not sure the odor was ammonia, but it was strong and
acrid, perhaps more like fresh "hypo."

In any case, it was Kodak Hypo Clearing Agent, and your explanation of what
took place is more than adequate for my curiosity.

Thanks again. You, sir, are a marvel of photographic knowledge.

Cheers,

Dick B.


"R.W. Behan" wrote in message
news
Greetings, B&W Dinosaurs;

Last night, developing some Ilford HP5 rolls, I mixed some new working
solution of Hypo Clearing Agent. The stock solution--stored in a cool,
dark darkroom--had been mixed about a year ago, and smelled VERY strongly
of ammonia. How come? Any ideas on the recommended shelf life of this
stuff?

Yes, I mixed a fresh batch, but can anyone explain the strong odor? What
are the decomposition products of clearing agent? Rich Knoppow?

BTW, it is GREAT to see so many diehards still fussing with black and
white. SILVER HALIDES FOREVER!!

Dick Behan
Lopez Island, WA