What are the ways of coffee packaging?
(1) Sealed packaging. To maintain the freshness of coffee, it is necessary to ensure the airtightness of the coffee packaging. If the coffee beans or powder are not isolated from the air, and the roasted coffee beans are very dry and easy to absorb water, exposure to the air means that the degree of deterioration will be accelerated. Therefore, merchants will choose to seal the coffee package and fill the bag with an inert gas, such as carbon dioxide or nitrogen. Or merchants will also choose vacuum packaging to directly extract air and moisture.
(2) Put in the deoxidizer. By adding specific substances, it chemically reacts with oxygen, moisture and even carbon dioxide in the air to eliminate the ingredients that cause the inferior quality of coffee beans. This coffee packaging method is similar to the desiccant in life.
(3) One-way exhaust valve. Carbon dioxide is continuously released from coffee beans or coffee grounds, causing the air pressure inside the coffee package to increase, which in turn carries oxygen and moisture from the inside out to the outside of the package through the exhaust valve. After that, air does not penetrate into the inside of the coffee packaging from the outside. Over time, all the gas inside the package will be replaced by carbon dioxide. This method is very common. Most of the coffee beans purchased online are packaged in this way, which is favored by merchants and consumers.