In terms of lasting 15+ years I seriously doubt it. Whether any paper developer last substantially longer say Ilford MG developer remains an open question to which there isn't or doesn't seem to be a definite answer - at least not for meIs there anything better?
For paper developing, I had nearly full bottles of Ilford Multigrade, Ilford PQ, and Agfa Neutol. All 15+ years old. All failed.
Is there anything better?
Buy some metol, hydroquinone, sodium sulfite, potassium bromide, and sodium carbonate and mix up D72 whenever you want, as much as you want. In nicely sealed containers, the powders will last a very long time. Buy a box of Borax and you can also make D76.
Photographers Formulary and Freestyle sell Liquidol. I think PF makes it.Liquidol was about the last developer that the late "Photo engineer" designed. unfortunatly B&H will not ship it to canada last time I looked.
some folks report very long life from "MIXED" Ansco 130 from Photographers formulary. it is unusual as the developing agent is not stable as a powder, but is stable when mixed.
LPD is also claimed to last ages in the bottle.
BTW, Rodinol was marketed when it first came out (1890s) as a paper developer, But the price teses days is a touch high to use it that way.
If you're already invested in some liquid concentrates, how about glass marbles added to displace the air? Is that a valid strategy for photo chemicals?
I'll second this as well. To make things easier when mixing print developers, you can use spoon measures. High precision isn't needed for D-72.Buy some metol, hydroquinone, sodium sulfite, potassium bromide, and sodium carbonate and mix up D72 whenever you want, as much as you want. In nicely sealed containers, the powders will last a very long time. Buy a box of Borax and you can also make D76.
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