How long can coffee beans and coffee powder be preserved-introduction to storage methods

How long can coffee beans and coffee powder be preserved-introduction to storage methods

1. Gas-containing packaging.

In the most common packaging, beans and powder are packed in glass cans, paper bags or plastic containers, and then capped or sealed. Low preservation, and because of contact with air all the time, need to drink as soon as possible, drinking period is about a week.

2. Vacuum packing.

The packing container (can, aluminum foil bag, plastic bag) draws out the air from the container after filling the coffee. Although it is called a vacuum, it actually removes up to 90% of the air and is not suitable for preserving coffee powder.

3. Gas filling packaging.

A pinhole is designed on the metal bag. After filling the coffee, inactive nitrogen is poured into the bag and the carbon dioxide in the bag is squeezed out of the pinhole. This method is more popular, but after all the gas is discharged, part of the air will be drilled back into the human bag from the pinhole.

4. Packing of gas absorbent.

When the absorbent made from deoxidizer and decarbonization is put into the bag, the air in the package can be easily absorbed, and the carbonation produced by the coffee can also be absorbed, but its disadvantage is that the aroma of the coffee will also be absorbed.

5. UCC Euro packing.

This is the most ideal outer packaging of coffee at present, all in the form of beans rather than powder. It is similar to the pinhole metal bag, except that the gas in the bag can be discharged through the pinhole, while the unidirectional piston can prevent the air from entering the bag. Immediately after the beans are roasted, the coffee manufacturers cool and pack the beans and pour nitrogen into the bag to discharge the gas from the bag. Although this kind of packaging is the most ideal, but the material is expensive and the cost is high. At present, only selected coffee from large companies will use this packaging method.

It really depends on the degree to which a person is required to drink coffee. Based on the difference in people's sensitivity to smell and taste, how many people can tell the difference between one and the other, or the difference between a month and a month? Therefore, as long as you know how to preserve coffee beans, one month is generally acceptable.

The shelf life of coffee powder is very short. After grinding into powder, due to the increase of surface weight and the acceleration of oxidation, a large amount of aroma and flavor will be lost. Therefore, unless you have to, for example, in the public office, when you can't grind the beans, it's best to buy fresh coffee beans and grind them before drinking them. In 1999, the American Fine Coffee Association (SCAA) defined "freshly baked coffee" as "freshly baked coffee": no matter how it is packed, it must be soaked within three to seven days after baking, and it must be soaked immediately after grinding. The conclusion made by Don Holly, the president of SCAA, is that this is not what coffee and bean producers like, because their distribution systems usually fail to deliver beans to consumers within a week.