Some people like beer, because it is a fantastic wine, full of foam filled the cup, so that the wine looks so fantastic. From the professional point of view, beer has a bubble, first of all because the beer in the fermentation produced a lot of carbon dioxide, bottled and filled with a certain amount of carbon dioxide. In addition, hops, wort and yeast and other beer raw materials in the fermentation process will produce a special protein, and dissolved in the beer, with a unique "bubble" effect. The following are the same as the ". 

When the beer cap is opened, the bottle pressure (pressure food) drops and the solubility of the carbon dioxide in the beer is reduced and released. As the fermentation of carbon dioxide generated in the beer in the binding of the dissolved state is relatively stable, the decomposition process is relatively slow release, and because of "foam protein (protein food)" adhesion is relatively large, which makes the beer bubble retention time is longer , The emergence of beer bubble "hanging cup" phenomenon. However, the bubble is not as good as beer, especially when opening the bottle cap and pouring into the cup, there is a lot of bubbles so that "spray" may indicate that beer has quality problems. The following are the same as the ".

One is the brewing raw materials may be some microbial contamination, destruction of the "foam protein" formation, after opening the carbon dioxide easy to escape, the bubble up quickly, disappear soon. The second is the beer bottled when filled with too much carbon dioxide, more than a liter of beer containing 5 grams of carbon dioxide standards. The third is due to improper storage of beer, the temperature is too high, or moving too much vibration. Fourth, due to the production process to avoid beer opacity and joined the papaya alcohol. These factors may affect the taste and quality of beer. Therefore, the quality of beer can not be good or bad to determine the number of bubbles. High-quality beer bubble should be delicate, white, and hanging cup lasting, drink after drinking a lot of foam is still above the wall, is the real good beer.