Hops are an indispensable raw material for brewing. In the process of brewing, they have the functions of natural preservative, prolonging the shelf life of beer, forming the fine foam of beer, clarifying wort, making beer clear, and balancing the sweetness of wort to make beer delicious.At the same

The foam properties of beer includes four aspects: foaming ability, foam appearance, foam persistence and foam hanging cup. Among them, the foaming ability refers to the ability to form foam and the height of the foam, the appearance of the foam refers to the color and the degree of fineness of the foam, the foam lasting refers to the time after the foam is formed until the foam disappears, and the foam hanging cup refers to the foam staying on the wall ability