Freshness is the life of coffee.

Freshness is the life of coffee

There are three ways to determine the novelty of coffee beans: smell, see, and peel.

Smell: put the coffee beans close to the nose, take a deep smell, is not arrogant to smell the aroma of coffee beans, if so, it means that the coffee beans are novel enough. On the contrary, if the fragrance is weak, or if it has begun to show a greasy smell (similar to the taste of peanuts or sturdy ones that will appear for a long time), it suggests that the coffee beans are not new at all. No matter how much effort you put into grinding and cooking such coffee beans, you will not be able to make a good cup of coffee.

Matters needing attention in the purchase of coffee beans

Look: spread the coffee beans on your hands, determine the origin and variety of coffee beans, and determine whether the coffee beans are roasted evenly.

Peel: take a coffee bean and try to peel it off by hand. if the coffee bean is novel enough, you should be able to pull it away easily, and there will be a crisp sound and feeling. If coffee beans are not new, you will find that you have to work very hard to get rid of a bean. Another important point to look at when peeling off the coffee beans is to see if the firepower is even when baking. If average, the color of the outer skin and inner layer of the beans should be the same. If the color of the surface layer is much darker than that of the inner layer, it suggests that there may be too much firepower during baking, which will also affect the aroma and flavor of coffee beans.

To start buying coffee beans, first choose coffee shops where business is booming. The freshness of roasted beans is the life of coffee, so choose a warehouse for novel coffee beans, the place is clean and there is no oil residue on the beans, and there are no shops with direct sunlight and no high temperature around. In addition, it is also a good way to purchase in their own baking stores that think they are fragrant and mellow.

When purchasing baked beans, the refreshing beans can be designated by yourself. I hope to drink some slightly sour ones with a strong bitter taste, or directly tell the staff to choose for their own happiness.

Gaseous packaging

When purchasing the post-care store for grinding, it is necessary to inform the manager of the coffee making utensils used to cooperate with the grinding of those props (such as electric coffee maker, filter, paper, siphon, etc.).

When purchasing canned coffee powder in the supermarket, choose the label (the type of beans or the tendency of taste, etc.), depending on your own preference.

The secret of keeping coffee beans

Roasted coffee beans are easily oxidized and contaminated by oxygen in the air, so that the oil quality is deteriorated, the fragrance is also volatile, and then accelerated by temperature, humidity, sunlight and so on. In particular, through autocratic treatment of low-caffeine coffee beans, oxidation dyeing is carried out faster. Therefore, in order to maintain the aroma and quality of coffee, how to package and retain coffee beans has become a great knowledge.

Coffee beans will produce three times the volume of carbon dioxide after roasting, so the most important thing in coffee packaging is not only to avoid contact with air oxidation, but also to deal with the carbon dioxide produced by coffee beans.

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

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 area of the coffee powder is larger than that of the coffee beans, and even the leftover air can easily be connected with the powder and 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 pinhole is squeezed out. This method is more popular, but after all the gas is discharged, the oxygen is quietly drilled back into the bag. The gas absorbent package puts the absorbent made of deoxidizer and decarbonization into the bag, the air in the package can be easily received, and the carbonated gas produced by the coffee can also be inhaled, but the fragrance of the coffee will also be sucked away is a mistake.

UCC Asia Rome Packaging

For the most ideal outer packaging of coffee at present, all of them are packed 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 outside the bag from entering the bag.