Thanks useful information: 
Hi all.
Ilford states that their Multigrade developer lasts up to 2 years unopened or 6 months open in a tightly sealed bottle. However I can't find anywhere (except that it does 100 RC sheets of 8x10) how long it lasts in an accordion bottle once used sparingly after mixing it to a 1-9 strength. I have only developed about 7 or 8 sheets and would like to continue using it. It was mixed and bottled about three weeks ago.
Thoughts and comments please.
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