Hand-brewed coffee knowledge｜Why does the powder bed not bulge during steaming? Are the single-origin beans that cannot be packed in a bag of poor quality? Does the bigger the bulge in the powder bed mean the fresher the coffee?

Whenever Front Street brews coffee by hand, as long as the bulge in the powder bed is relatively large during steaming, there is a certain probability that customers and friends will ask: "Why is the bulge in the powder bed not so big when I brew coffee?" This is a topic that Front Street often shares! It makes sense, although the drum sound when steaming