The basic taste of coffee is: sour, bitter and sweet. Sour taste is a basic taste of coffee, caused by organic fruit acid, citric acid, malic acid and so on.
Followed by the bitter taste of caffeine, quinine and a different alkaloid coffee taste, this is another basic taste of coffee, good coffee has a certain degree of bitterness.
The one way exhaust valve reviews the third aspect of coffee based on the taste. The first is a strong feeling. After the coffee is drunk, some are very strong. The whole mouth has a full sense of the mouth, and the long time table will disappear. This is a kind of superior coffee. Some coffee drinks like a cup of clear water, a touch of light, without any feeling, lost the rich fragrance of coffee. The other taste of coffee is astringency, which is a special aftertaste that makes the mouth feel dry. People don't like it
When you or your customer have high requirement on the coffee kit, please also remember to have your coffee bean packed with a coffee valve without filter.
Brewing methods have different requirements on the powder thickness, exhaust valves without filter is suitable for whole-bean product that can be grinded at home.
Brewing method and the storage condition are both affecting coffee taste, and the exhaust valve with filter installed on package is suitable for powdery product.
We recommend you keep coffee beans in containers with one-way degassing valve, it helps to prevent quality change and to extend shelf life during ‘resting’.