Response to fixer test solution tells you...?

To find out if your fixer is still active take a piece of un-exposed film and put it in your fixer and see how long it takes to fix, then double the time, if it is over 6 or 7 minutes you might want to make fresh fixer. I have had fixer that was 8/9 months old still working in 5 minutes. Regards, Pat

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