Seconding what others have said... the undiluted concentrate will last
for a long time. I had some HC110 that was pushing 7 years when I
finally used it up. I would migrate it to smaller bottles as it would
fit, but it spent a good bit of time with some air in the bottles. The
concentrate got darker and some semi solid sludge formed at the bottom,
but it still worked fine.I have never attempted to store the diluted
mixture - just mix it for one shot use using a syringe as Bill
described. I get larger syringes for dispensing cough syrup etc to
infants at the local drugstore.
Last summer I finished off the last bottle of Agfa Rodinal that I bought
in 2005 after Agfa discontinued manufacture of it. Same experience as
with the HC110 - much darker (almost black) and with some sludge in the
bottom of the bottle, but worked fine. That was approaching 10 years old.
FWIW - I have had much worse luck with old bags of powder developer -
the foil lined bags that Kodak used in the past - than with liquid
concentrates. Powders in cans and the newer plastic bags have been fine
though.
Good luck
Mark
On 1/10/2016 9:24 PM, Collin B wrote:
I don't process as much b&w as I would like. My HC110 turns red or pink and
becomes unusable. What is the best way to keep it long term?
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