Introduction of how to make the difference between espresso and American coffee

How to Make Espresso Coffee Steps and American Coffee Differences Introduction

The higher the brewing water temperature, the less sour coffee, bitter and burnt, the lower the water temperature, the higher the acidity, bitter and burnt, so the ideal water temperature should be adjusted according to different beans and recipes, such as deep roasting with lower water temperature, light roasting with higher water temperature. My favorite water temperature is 91 degrees.

Most household machines are difficult to stabilize due to the use of heating blocks or smaller boiler water temperatures. In the process of extraction, the temperature difference can reach 10 degrees, even if the operator is careful, it cannot overcome this hardware bottleneck. Large mainstream commercial machines (heat exchange type) also have a temperature difference of 4-8 degrees, so there are considerable requirements for operator control. Double-boiler and multi-boiler system with independent PID temperature control coffee machine, temperature control is relatively easy to achieve stability, I use the Aibo double boiler can make a cup of esp extraction process only 0.5 degrees temperature difference, higher-end coffee machine such as synesso, slayer, etc., can control the temperature in the range of 0.1 degrees, and human taste for the impact of temperature resolution limit of 0.3 degrees, so 0.1 degrees temperature control for humans is perfect

When it comes to presenting a skill in words, there are many inconveniences. In terms of powder pressing, it is roughly divided into coarse powder heavy pressure pie, fine powder light pressure pie and no pressure pie. No matter which genre it belongs to, it can make perfect esp of different styles. Among them, the school of no pressure powder is the most minority and difficult to master, because it takes a lot of energy and time to find the critical point of powder quantity and powder thickness, and has certain requirements for bean grinding machine. The advantage of not pressing powder is that once found, it can avoid the failure of pressing powder. But because there are many variables to make a cup of coffee, if you master the light pressure and heavy pressure as a new experience, but here you don't recommend italian coffee machines using pumps to generate pressure, roughly divided into vibration type and rotary type, vibration type small size, low cost, mostly used in household machines, such as XX coffee machine, pump pressure 15bar or pump pressure 19bar, which means that the pump pressure peak can reach 15bar or 19bar, but not stable at a certain value. It fluctuates between 1- 15 bar. This is also one of the reasons why the coffee made by the home machine tastes too much. This is also another reason why I don't think cone grinder can bring deep flavor, because if this logic holds true, the unstable pressure of vibration pump will also bring different levels of flavor. The lower the controllability in brewing, the worse the stability of taste.

Rotary pumps are mostly used in commercial machines and high-end professional household machines because of their large size. The pressure can be stabilized at a fixed value. From a straight point of view, the pressure curve of the vibrating pump fluctuates, and the pressure curve of the rotating pump tends to be a straight line. The two are not the same. The use of the rotating pump is a major factor in stable extraction. In addition, the rotary pump noise is much lower than the vibration pump noise, some vibration pump noise gives people a sense of insecurity and cheap, noise will also affect people's mood, so it is not recommended to use the vibration pump coffee machine as a business machine.

Current esp brewing theories range from 9±1 to 9±0.5 and 9±2. In order to remember and understand the individual is set at 9.