In the 18th century, the colonial English empire were producing some special beers with more alcohol and more hops than usual, so they could last the long journey to India. And so the India Pale Ale was born, also called IPA. During the craft beer revolution in the United States, this style was reinvented with malts and hops from the nearby regions, creating then the American IPA.

EBC (European Brewery Convention) is a standard method for measuring the color of the beer which is determined by measuring the reduction in intensity of light passing through 1 cm of beer. The highest value is the darkest is the same.

IBU (International Bitterness Kingdom) is a scale for measuring the degree of bitterness of a beer, comprising values between 0 and 100, although there are beers with values well above IBU. Bitterness is closely linked to taste the same, but the degrees of alcohol.