Three Major Factors Affecting Coffee Flavor
The freshly roasted coffee beans will be heated by the green coffee beans, and there will be a large amount of carbon dioxide inside the coffee beans. At this time, the state of brewing and drinking can only be described as "unstable" (because the water and coffee powder are combined during brewing, the strong gas in the coffee beans will affect the release of coffee substances from the water, resulting in a drop in coffee extraction)
It needs to be left for 1-2 days to exhaust the excess gas so that the flavor of coffee can be slowly stabilized before brewing. The shelf life of coffee beans begins from the moment they are roasted. Generally speaking, after the roasted beans are put into bags, packaged, and sealed, they will have a shelf life of about half a year in a dry and cool environment without unpacking.
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The shelf life of coffee beans is usually up to six months when the packaging is not opened. However, once they are opened and used, they will contact with a large amount of air, and the aroma will start to lose quickly and the flavor will not stop oxidizing. At this time, it is recommended that you do not put them in half a year, and it is best to drink them within one month from the date of opening. If you buy ground coffee powder, the area exposed to air is much larger than that of coffee beans, It deteriorates faster and is not durable. The sooner you drink it, the better (some coffee shops refuse to grind coffee beans for fear of losing the flavor of coffee, and only sell coffee beans to customers with a grinder).
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Three Killers Of Coffee Flavor Loss
Factors affecting coffee preservation include:
1. Air:
Coffee beans themselves contain oil. The more roasted they are, the more obvious the oil will appear on the surface. Once the oil comes into contact with the air, it will oxidize, thus producing an oil consumption odor. Therefore, when storing coffee beans, we must try our best to avoid the air. Vacuum and hermetic tanks are commonly used as storage containers to isolate outside air. (Airtight containers are recommended as a preference)
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2. Temperature:
The sources of heat include the sun, light, fire, etc. no matter which kind of heat, it will accelerate the volatilization of aroma and the oxidation of oil, and make the quality of coffee deteriorate at a faster speed. That is why the quality of coffee beans is easy to change in hot summer. In order to avoid the quality deterioration caused by high temperature, please be sure to choose a cool place where the coffee beans can not be exposed to the sun, no one can direct the light at a close distance, and avoid the fire source such as a gas furnace. (it is recommended to use a styrofoam box / moisture-proof box and place it in a cool place)
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3. Humidity:
Freshly roasted coffee beans have a lower moisture content. Just because the moisture content of fresh beans is very low, if the surrounding environment is relatively humid, the coffee beans will become hygroscopic, and the moisture content will become high, and the aroma and quality of the coffee will be quickly lost.
How To Store Coffee Beans Correctly
In fact, it is not difficult to preserve coffee beans better so that the insurance period is extended. You can master the following principles.
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1. Opened packages of coffee beans must be stored in sealed tins or coffee bags with one-way venting valves. When buying, try to choose smaller packs so that you can use them up in the shortest possible time. Don't stock up on beans, buy as many as you need. It is advisable to buy only a two-week serving size.
2. No matter whether the beans are opened or not, please put them in a cool, dry, ventilated place without sunshine and light, and the temperature and humidity are stable.
3. Like other foods, coffee beans should be brewed as soon as possible, no matter how well the storage conditions are controlled.
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