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Ground coffee! how long does it remain fresh?

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  • #16
    30 seconds

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    • #17
      Does anyone know of any scientific based research on shelf life of green beans, roasted beans and ground beans?

      Given it's a global $20 billion dollar industry, I'd hazard a guess many (many) companies have done the research though not necessarily made it freely available.

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      • #18
        There are a number of chapters in Espresso Coffee the Science of Quality by Illy & Viani, related to staling from a scientific perspective, which if you try and read you will realise it's not as simple as is generally quoted on this forum ad nauseum. Many factors are involved in staling and storage etc. Much of the reading goes a bit over my head not being a scientist, but think I get the jist of it, although it does not try and define it in terms of 4years, 4weeks, 4mins or whatever the latest quote of the week is.

        Common sense & taste with a dash of practicality works for me. I grind coffee for my partner to take to work for a plunger that lasts a week. For her it's good enough, much nicer and more convenient than the alternative, and cheaper than 3 or so t/a espresso's a day.

        GrahamK
        Last edited by GrahamK; 7 August 2016, 05:32 PM.

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        • #19
          Originally posted by GrahamK View Post

          Common sense & taste with a dash of practicality works for me.
          GrahamK
          Works well for most people Graham, perhaps not so much for them with a touch of the OCD's.

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          • #20
            I've noticed ground coffee changes, for the worse, in extraction after 4 minutes.

            Beans stored in hopper extract differently, need finer grind, than beans stored air tight container and added fresh, although I haven't worked out the timing on that one - only experience is periods of 12 hours or more.

            Green beans can be ruined on arrival or great for years.
            All depends on the journey from tree to your door and then how it is stored at home.
            Generally I try to buy beans within the 12 months of the harvest date (although hard to get that information) and then use within 6-12 months of receipt. Although, buying on CoffeeSnobs not such a concern on harvest date as turn over high, Andy roasting himself commercially and kicking goals with the awards.
            All sorts of fascinating information out there on moisture levels, moisture exchange, storage temps, affects of packaging on the bean - all great theory. Useful if you can implement it yourself from the farm gate.

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