How to Save Coffee

·Good use of carbon dioxide

Carbon dioxide has a higher specific gravity than air as a gas. Therefore, in the same confined space, carbon dioxide will settle at the bottom and air will float at the top. After understanding this truth, when choosing a container or packaging bag, you can judge its versatility.

·Use upright sealed cans

Therefore, the carbon dioxide released by fresh coffee beans will be stored at the bottom of the container, forming an antioxidant layer to protect the coffee beans; and it is best to keep the container upright to prevent the loss of carbon dioxide in the can or bag. Therefore, vertical, thin and tall containers with an upward opening are more suitable for storing coffee beans.

·Use opaque jars

Light is the catalyst for oxidation, and opaque pots slow down oxidation.

·Use of vacuum tanks

There are more and more vacuum tanks on the market, and the price is quite cheap. The jar is equipped with a mechanism that pulls or presses the air out of the jar to form a vacuum. Vacuum means there is no oxygen or moisture, and it is a good place to store coffee beans.

·Store in a cool, dry place

High temperature is easy to volatilize the aroma of coffee and the fine substances inside coffee beans, so coffee cans should be avoided as much as possible in high temperature environments, preferably placed in cool and dry places.

* Can coffee beans be stored in the refrigerator?

Fresh coffee beans within 10 days, because the development of the beans is still in progress, do not fit in the refrigerator. After that, the low temperature in the refrigerator can slow down the natural deterioration of coffee and is a good storage place. However, there are many conditions in the refrigerator environment, which must be eliminated in order to effectively protect coffee beans; otherwise, it will have the opposite effect. Therefore, the use of refrigerator to save coffee beans, seems to be unnecessary, and some trouble, if you really need to use the refrigerator as a place to save, please note the following:

·The air in the refrigerator is cold and irritable, easy to evaporate the moisture in the beans, so that the fragrance is lost; coupled with too much smell in the refrigerator, so it is more suitable to use vacuum cans to preserve coffee beans.

·When coffee beans are first taken out of the refrigerator, because the temperature of the beans is too low, they condense moisture in the air and form small droplets on the surface. After grinding, these droplets will form lumps of coffee powder, resulting in uneven brewing. Therefore, coffee beans should be taken out of the refrigerator before use, after taking a part, put the vacuum can back into the refrigerator as soon as possible, and quickly grind and brew coffee. If the whole bag of coffee beans is not put back into the refrigerator, it should be taken out 1 hour before use, and then opened after returning to normal temperature at normal temperature; in this way, the surface of the coffee beans will not condense.

·Also, because coffee is still developing internally after roasting, putting freshly baked beans in the refrigerator stops flavor development. Therefore, fresh coffee beans are not suitable for keeping in the refrigerator. Coffee beans that are not fresh, for example, more than 20 days old, can be considered for storage in the refrigerator.

* Coffee bag

Since freshness is important, how to maintain freshness becomes a critical issue. Around 1980, Fresco Company of Pennsylvania invented the One-Way Degassing Valve, which created great benefits for everyone.

The one-way vent valve is attached to the top of the coffee bag, which is called a fresh-keeping bag. It allows the carbon dioxide released by fresh roasted beans to escape from the bag, but the oxygen outside the bag will not enter the bag. Now, crisper bags are quite common. Consumers can feel it with their fingers on the better roasted bean coffee bags. There is something similar to a round button, which is a one-way exhaust valve.

·Benefits of one-way exhaust valves

Freshly roasted beans release a lot of carbon dioxide gas, up to 5-12 liters per kilogram, which will burst the coffee bag. In the past, the industry had to let coffee beans sit for a longer time after roasting and emit more gas; thus, time and space were both costs and burdens.

There are also industries that secretly prick a small hole in the coffee bag with a needle to let the gas escape. However, this will allow external oxygen to enter the bag, cold oxidation of coffee beans, destroying freshness.

With a one-way exhaust valve, the industry can bag early and keep the coffee beans fresh to meet the needs of savvy consumers.

·Drinking as soon as possible after opening is the best policy

However, one-way exhaust valves do not always solve the problem. First, the natural decay of coffee beans occurs all the time, even in the crisper bag; second, the one-way vent valve does not function after the consumer opens the crisper bag. Therefore, the preservation bag is not a panacea, and drinking as soon as possible after opening is the best policy.