Basic knowledge of Espresso factors affecting the quality of espresso

On the basis of affecting the quality of coffee, we divide the production process into several elements to facilitate the organization of a large number of materials, not to say that these elements are independent of each other or can be defined separately.

For example, there are many small factors that affect the pump pressure, we just assume that they are normal, the valve seal in the machine is in good condition, and the outlet head seal ring is soft and tough, ensuring good sealing performance. We also assume that the pump is working properly, and so on. In reality, everything changes at different times. Therefore, do not fix your knowledge on these elements of our division. Read this book to understand the basics, and you can reorganize the elements to establish your own espresso making process.

In the practice of making espresso, it is difficult to separate one factor when several factors go wrong at the same time. Different factors intersect and influence each other. According to Dr Ernesto Illy, there are thousands of possibilities for making mistakes, and only one combination can get the best results. To get a good espresso, you have to think about not only one factor, but also all the factors and how they relate.

Here are some common factors that affect espresso:

Environmental factors: humidity, temperature, light

Raw material factors: cleanliness and mineral composition of water, freshness of coffee, roasting and formula of espresso beans

Equipment factors: espresso grinder, espresso machine, capacity of espresso, equipment cleaning, pump pressure

Production technology: pressing tools and technology of coffee powder, filling of coffee powder, production time, cooking water temperature, grinding adjustment