Should Beer Have a Head?

It is one thing to be a beerhead, and quite another to have a beer head. A beer’s head is the layer of foam on top of the liquid, visible when the beer is poured into a glass or a mug. The head is formed by the bubbles of carbon dioxide in the beer rising to the surface and being held together with surface tension. Fermentation produces natural carbon dioxide, but many beermakers also add is to their products specifically to produce a good head… read more >