Hi, After years straying in the virtual digital world, I came back to analog photography. I'm experimenting with all kind of developers and films which I kept partially used at home. I found a 500 ml bottle of Rodinal made by AGFA, 3/4 filled and turned into tee colour. I had bought it some 10 years ago! The plastic bottle, kept in the dark, but not so cold place in summer time, wasn't even squeezed and looked brand-new. No cristals on the bottom. I gave it a try and the result was as it was bought yesterday! Together with HC 110, Rodinal has the best keeping properties. It really lasts "forever".