Basic knowledge of high-quality coffee matters needing attention in the purchase of coffee beans

To start buying coffee beans, first choose a coffee shop where business is booming. The freshness of roasted beans is the life of coffee, so choose a warehouse for fresh coffee beans, a clean place with no oil residue from old beans and shops with no direct sunlight and no high temperature around. It is also a good way to buy in a self-baking store that you think is fragrant and mellow. When buying baked beans, you can specify the refreshing beans by yourself. if you want to drink some slightly sour ones, the bitter ones are better, or directly tell the clerk to choose for your preferences.

When buying rear care shop grinding, be sure to inform the manager of the coffee making utensils used to match those props grinding (such as electric coffee maker, filter, paper, siphon, etc.).

When buying canned coffee powder in the supermarket, choose the label (the type of beans or the tendency to taste, etc.), depending on what you like.

Gaseous packaging

In the most common packaging, beans and powder are packed in empty cans, glass, paper bags or plastic containers, and then sealed or sealed. The preservation is low, and because it is in contact with the air all the time, it needs to be drunk as soon as possible for about a week.

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 at most 90% of the air, and the surface area of the coffee powder is larger than that of the coffee beans, and even the remaining air can easily combine with the powder to affect the flavor.

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, the oxygen is quietly drilled back into the bag from the pinhole.

Gas sorbent packaging

Put the absorbent made of deoxidizer and decarbonate into the bag, the air in the package can be easily absorbed, and the carbonation produced by the coffee can also be inhaled, but the aroma of the coffee will also be sucked away is its disadvantage.

UCC Asia Rome Packaging

At present, it is the most ideal outer packaging of coffee, all in the shape 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 oxygen from entering the bag.

Immediately after the beans are roasted, the coffee manufacturers cool the beans and pack them, pour nitrogen into the bag and discharge the gas from the bag. Although this kind of packing method is ideal, but the material is expensive, the cost is high, at present only the selected coffee of large companies will use this kind of packaging method.