Beer foam more or less good

Beer quality stand or fall not to bubble how many to order. Good beer foam should be fine, white, and lasting hanging cup, wine juice drink after there are still a lot of bubbles in the glass, is the real good beer. Beer is a bubble, the first is due to the beer during the fermentation to produce large amounts of carbon dioxide, when the bottle again into a certain amount of carbon dioxide. In addition, hops, yeast and malt juice beer raw materials in the fermentation process can produce a kind of special protein, and dissolved in the fluid of the beer, have unique foaming effect. When the beer bottle cap is opened, the pressure in the bottle, Pressure of food) Fell, the co2 solubility in the fluid of beer reduce, was released. The carbon dioxide produced by fermentation when compared with dissolved state in the beer stability, slow the process of decomposition release, due to the foaming proteins ( Protein foods) The adhesive degree is bigger, which makes beer foam retained longer, appear beer foam cup. Beer foam is not the more the better, especially when open the bottle caps and pour into a cup, appeared a large number of bubbles that spraying, may indicate that beer has a quality problem. One is liquor-making raw materials may be some microbial pollution, damage to the formation of foam protein, after open a bottle of carbon dioxide to escape, bubble up quickly, disappeared quickly. Secondly, beer bottle filling the excess carbon dioxide, more than a liter of beer containing 5 grams of carbon dioxide. A third is due to the beer store misconduct, the temperature is too high, or move the vibration too hard. Its 4 it is because in the process of production in order to avoid alcohol beer turbid and joined the papaya. The above factors can affect the taste and quality of beer. The previous: how much beer degree generally next article: how to brew beer