Why are there little holes or valves in my bag of coffee beans?
Why are there little holes or valves in my bag of coffee beans?Answer: If you buy roasted coffee from a quality establishment (and you should, at least occassionally), you might be curious about the holes or valves that your coffee bags have. Freshly roasted coffee beans give off a great deal of carbon dioxide, for several hours after roasting. To prevent this “off-gassing” from bursting their bags, coffee roasters used to hold coffee for up to 24 hours before packaging. This meant that your coffee was already a day old before it even left the supplier. By using bags with one-way air valves, coffee can be packed immediately without off-gassing worries.
