Lifespan of PMK : LUSENET : B&W Photo - Film & Processing : One Thread

I know the Book of Pyro says 'years and years' but I've got some PMK I mixed about two years ago and it's sitting in the nice brown bottles from Photo Formulary. It's been sitting above the sink in my darkroom through two winters and now two summers.

Do you all think this stuff is still alive? I'm planning on using it with Tri-X for a series of family portraits and I'd rather just start with a fresh batch than test my nights away.



-- David Parmet (, June 06, 2002


My bet would be that it is still good. Which is the advantage of dividing the developing agent from the accelerator--long shelf life.

-- Ed Buffaloe (, June 06, 2002.


I am finishing a PMK supply that is just over two years old and it works just as well as when I started it.

Good Luck, Greg

-- Greg Rust (, June 06, 2002.

I agree with the others: it's definitely still good.

-- Ted Kaufman (, June 06, 2002.


Sometimes it's hard to believe the claims made about shelf life...

-- David Parmet (, June 07, 2002.

I find that the "B" solution will precipitate out if kept in cold conditions, like my Minnesota dark room in Janurary, if in plastic bottles. I have not had the problem since switching to glass containers.


-- Brook Martin (, June 07, 2002.

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