Beer foam is a complex and far from well understood phenomenon. So, what is foam? In short, foam is a relatively large amount of gas dispersed in a relatively small amount of liquid. It doesn't happen spontaneously - it requires some energy, such as agitating the beer (e.g. shaking or stirring) or c

A glass of beer without a noticeable head of foam just looks wrong to craft beer fans. But have you ever wondered why those frothy bubbles are such an important component of the brews you love?

What Is Foam, And How Does It Take Place?You can simply put a foam as a two-phase system that allows gas to dispense into a small amount of liquid through a continuous process. If you didn’t know, the life span of beer foam starts with bubble formation, then creaming, disproportion follows, and last