The preparation of a perfect Italian espresso or cappuccino coffee requires the use of a special coffee machine. The coffee machine forces hot water at a pressure of 20 bar through about 10 grams of finely ground and compressed coffee, extracting the aromatic substances such as coffee oil and fully dissolving them in the hot water, which then flows into the cup. The whole process is a comprehensive process of physical and chemical interaction, and it must be completed within 18-28 seconds in order to effectively avoid the bad taste caused by excessive extraction. The high-pressure steam produced by the coffee machine emulsifies the milk and produces a fragrant milk foam, and a thick layer of milk foam on top of the Italian espresso coffee becomes a delicious cappuccino coffee. It is obvious that the generation of a high-quality Italian espresso or cappuccino coffee, the coffee machine plays a decisive role. styles to meet your needs.