[pure-silver] Re: Opinions on chemistry longevity


Hi Jeffrey,

A couple of years ago, Nicholas Twist, a New Zealand photographer who is also a home-brewer of developers, did a bit of a longevity test with a bottle of Rodinal from (I think) the 1960s. It worked just fine. He posted about it on photo.net, you may want to search the threads there.

Dry chemicals generally keep for a long time in sealed packets. Moisture and oxygen are the real enemies.

If the ampule is sealed and the gold chloride was stored in the dark, it too should be okay.

Good luck!

Jordan


jeffrey wrote:
Someone recently gave me 10 unopened 125ml bottles of Rodinal. These are old enough that the boxes are not the current mostly-red box, but a box that is mostly white, with a red band with white letters "AGFA", then a green band with black letters "RODINAL". I see nothing on the box or on the bottle to indicate a date.

How long could you reasonably expect Rodinal to remain good in an unopened container?

I was also given quite a bit of old Koday dry chemistry (D-11, D-76, etc.) If the bags did not get wet, do they decay enough so that 20 years is too long to expect use?

I also got a glass amphule (sp?) of Gold Chloride that looks to come from the 1960's. Could that still be good?

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Jordan Wosnick
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