The master taught you the secret of preserving coffee beans.
In order to maintain the aroma and quality of coffee, do not allow oxidation of roasted coffee beans, packaging and preservation of coffee beans has become a university. Coffee beans produce a lot of carbon dioxide after roasting, so coffee packaging should not only avoid contact with air oxidation, but also deal with the carbon dioxide produced by coffee beans.
Coffee beans are preserved in several ways:
(1)Gaseous packaging. The most common packaging, with glass cans, paper bags or plastic containers to package beans, powder, and then cover or seal packaging. Low preservation, and because of contact with the air at all times, need to drink as soon as possible, drinking period of about a week.
(2)Vacuum packing. Packaging containers (cans, aluminum foil bags, plastic bags) After filling with coffee, the air inside the container is evacuated. Although it is called vacuum, it actually removes at most 90% of air and is not suitable for preserving coffee powder.
(3)Gas filled packaging. A pinhole is designed on the metal bag. After filling the coffee, the inactive nitrogen gas is filled to squeeze out the carbon dioxide in the bag from the pinhole. This method is more popular, but after all the air ^: is exhausted, there will be some air from the pinhole back into the bag.
(4)Gas sorbent packaging. The sorbents made of deoxy and deoxy are placed in packaging bags, and the air in the packaging can be easily absorbed, and the carbonic acid gas generated by coffee can also be inhaled, but the disadvantage is that the aroma of coffee will also be absorbed.
(5)Roman packaging. This is currently the most ideal coffee packaging, all in the form of beans rather than powder packaging. It is similar to a pinhole metal bag, except that the gas inside the bag can be discharged through the pinhole, and the one-way piston can prevent the air outside the bag from entering the bag. Coffee makers cool the beans immediately after roasting and pump nitrogen into the bags to vent the gases. Although this packaging method is the most ideal, but the material is expensive, high cost, currently only the selection of coffee companies will use this packaging method.
Source: China Coffee Network
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