Beer foam is a complex and difficult to understand phenomenon. What is a bubble? Simply put, foam is the process by which a large amount of gas escapes from a relatively small amount of liquid. Foam does not occur spontaneously, but requires an external force such as shaking or pouring into the cup to cause the gas to escape, sometimes known as "bubbling". So, beer brewing equipment manufacturers talk about how to get better foaming effect?

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