old developing chemicals

Film Photography & Darkroom discussion

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Lowell Huff
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Joined: Thu Aug 19, 2004 6:09 pm
Location: Los Angeles, CA 90061
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Postby Lowell Huff » Mon Jan 03, 2005 11:30 am

Old chemicals are never a bargain, throw them away.


Lowell Huff
Posts: 129
Joined: Thu Aug 19, 2004 6:09 pm
Location: Los Angeles, CA 90061
Contact:

Postby Lowell Huff » Wed Jan 05, 2005 1:45 pm

Powder chemicals will react over time just as liquid chemicals will. It is not moisture that oxidizes developers but oxygen. One small pin hole in a package will oxidize the entire package very quickly. Even without the entry of oxygen into the package, the alkalinity in the developer will eventually attack the developing agents in the bag causing less activity than when the product was originally packaged. Resulting in less than predictable results. There is a reason the manufacturer dates the package.


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