General knowledge of fine coffee matters needing attention for coffee beans

To start shopping for coffee beans, first choose a coffee shop that is booming. The freshness of roasted beans is the life of coffee, so choose a warehouse where fresh coffee beans are placed, a clean place without oil residue of old beans, no direct sunlight, and no high temperature around the store. It is also a good idea to buy from a shop that thinks it is delicious. When buying baked beans, you can specify the refreshing beans yourself, if you want to drink some slightly sour, the bitter ones are better, or tell the clerk to choose for your preference.

When purchasing after-sale grinding, be sure to inform the store manager of the coffee brewing equipment used, etc., in order to cooperate with those props grinding (such as electric coffee machine, filter, paper, siphon, etc.).

When buying canned coffee powder in the supermarket, choose the label (bean type or taste tendency, etc.), depending on your preference.

gas-containing package

The most common packaging, with empty cans, glass, paper bags or plastic containers to package beans, powder, and then cover or seal packaging. Low preservation, and because of constant contact with the air, need to drink as soon as possible, drinking period for about a week.

vacuum packaging

Packaging containers (cans, aluminum foil bags, plastic bags) After filling with coffee, the air inside the container is evacuated. Although it is called vacuum, in fact, at most 90% of the air is removed, and the area of coffee powder is larger than the surface area of coffee beans, even if it is the remaining air, it is easy to combine with the powder and affect the flavor.

gas-filled package

A pinhole is designed on the metal bag. After filling the coffee, inert nitrogen is injected to squeeze out the carbon dioxide in the bag from the pinhole. This method is more popular, but after all the gas is exhausted, the oxygen will silently drill into the bag from the pinhole.

Gas sorbent packaging

The sorbents made of deoxy and decarbonization are placed in packaging bags, and the air in the packaging can be easily absorbed, and the carbonic acid gas generated by coffee can also be inhaled, but the aroma of coffee will also be sucked away.

UCC Rome Packaging

The most ideal coffee packaging at present, all in the form of beans rather than powder packaging. It is similar to a pinhole metal bag, except that the gas inside the bag can be exhausted through the pinhole, and the one-way piston can prevent oxygen outside the bag from entering the bag.

Coffee makers cool the beans and pack them immediately after they are roasted. Nitrogen is pumped into the bags and the gases are vented. Although this packaging method is ideal, but the material is expensive, high cost, currently only the selection of coffee companies will use this packaging method.