Is the more beer the better?

The reason why there are bubbles in beer is that beer first produces a lot of carbon dioxide during fermentation, and it also charges a certain amount of carbon dioxide when it is bottled. In addition, beer materials such as hops, wort, and yeast produce a special protein during fermentation and dissolve in the beer liquor, which has a unique "bubbling" effect. When the beer bottle cap is opened, the pressure inside the bottle (pressure food) drops, and the solubility of carbon dioxide in the beer liquor decreases and is released. Because the carbon dioxide produced during fermentation is relatively stable in the state of binding and dissolution in beer, the process of decomposition and release is relatively slow, and due to the relatively high degree of stickiness of “foaming protein (protein food)”, this results in a longer time for the retention of beer foam. , there is a phenomenon of beer foam "hanging cup".

However, the foam of beer is not as good as possible, especially when a large number of bubbles appear when the bottle cap is opened and poured into the cup so that “spraying” may indicate that the beer has quality problems. The first is that the raw material of wine may be contaminated by certain microorganisms, destroying the formation of "foaming protein". After the bottle is opened, the carbon dioxide easily escapes. The bubble rises quickly and disappears quickly. The second is that beer is filled with too much carbon dioxide, exceeding the standard of 5 grams of carbon dioxide per liter of beer. The third is due to improper storage of beer, excessive temperature, or excessive vibration when moving. Fourth, due to the addition of papain to avoid beer turbidity in the production process. All of the above factors may affect the taste and quality of beer.

Therefore, the quality of beer cannot be determined by the amount of bubbles. The foam of high-quality beer should be delicate, white, and long-lasting. After the liquor is finished, there is still a lot of foam on the wall of the cup. This is a real good beer.