Roasted coffee is best stored in an airtight container and keeps for about 7 days.: As coffee rests after roasting, it releases CO2. This process is called “outgassing”. This generally prevents staling, or oxidation, for the first few days of a roast. Dark roasts will out gas longer than medium or light roasts, and hence they can benefit from a longer restingEither the resting of parchment coffee after drying, or for the home roaster, post-roast resting.: Resting might refer to "reposo", the time after drying the parchment coffee, when... period. Generally coffee is best rested for 24 hours before brewing. Once cool, roasted coffee is best stored in an airtight container or container with a one-way valve designed to release CO2. Roasted coffee can be double wrapped and placed in a freezer and left there to prolong its freshness. Once you are using the coffee, it is best to leave it out at room temperature and not store it in the freezer as the temperature changes are not good for the coffee.