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Tom Hoskinson · 09-17-2004, 05:55 PM

Most photographic chemicals will remain stable for a very long time if they are kept cool, dry and dark. There are exceptions - glycin is one example. I have sodium sulfite from the 1940's that is still ok, and some pyrogallol and hydroquinone from the same era that is ok as well.

I have previously written about the Phenidone I bought in the early 1970's (stored in amber glass containers) that is still fully active. I mixed some concentrated developer with it yesterday.

I also have potassium bromide that has turned into a facsimile of a concrete block - stored it in the wrong environment.

09-17-2004, 05:55 PM	#2 (permalink)
Tom Hoskinson Join Date: Mar 2004 Location: Southern California Posts: 3,879	Most photographic chemicals will remain stable for a very long time if they are kept cool, dry and dark. There are exceptions - glycin is one example. I have sodium sulfite from the 1940's that is still ok, and some pyrogallol and hydroquinone from the same era that is ok as well. I have previously written about the Phenidone I bought in the early 1970's (stored in amber glass containers) that is still fully active. I mixed some concentrated developer with it yesterday. I also have potassium bromide that has turned into a facsimile of a concrete block - stored it in the wrong environment. __________________ Tom Hoskinson ______________________________ Everything is analog - even digital :D