Italian American coffee machine coffee powder how much coffee powder is used at a time to grind the thickness

American coffee made with only one serving of espresso hot water will taste very light and can not meet the needs of the guests. (so now basically American coffee is served with double espresso.)

Then let's talk about why we first add hot water and then pour it into espresso (the temperature of hot water we receive is about 95 °C-99 °C, and the temperature of espresso extraction is about 65 °C. if espresso is poured into the cup first, and then hot water is added, the substances in the coffee liquid will be extracted again, resulting in excessive coffee extraction. So we first add the hot water to the cup, which can lower the temperature of the hot water first, prevent the coffee from being extracted again, and cover the liquid surface with a beautiful layer of crema.

Since we can't afford the Tuhao coffee machine, we should return to the traditional espresso machine and return to espresso's golden rule of "extracting 1 ounce (30ml) of espresso (espresso) in 25-30 seconds at 90-92 degrees Celsius under 9bar pressure."

Although this golden rule is still controversial in professional coffee forums in recent years, 9bar pressure is basically not controversial, so a bunch of coffee machines boasting 15bar or higher actually refers to the most high pressure of the coffee machine, which is of little significance, and is generally used to fool newcomers. Stable pressure and stable temperature are the criteria for measuring Italian coffee machines.

Now that you know the two most important factors of espresso (espresso), you can choose the espresso machine, all traditional espresso machines are designed around these two factors.

In the Italian coffee machine, the influence pressure value is mainly the pump, the pump is divided into the vibration pump and the rotary pump, the pressure curve of the vibration pump fluctuates, and the pressure curve of the rotary pump tends to be a straight line, but the machine of the rotary pump is not less than 8000 at present.

In the Italian coffee machine, the temperature value is mainly affected by the size of the boiler or heating block, as well as good heat conduction materials, there is an obvious difference between the toy machine and the professional Italian coffee machine. In general, many standard toy machines are equipped with small boilers (below 200ml) or small heating blocks, so it is difficult to achieve a stable temperature, and the temperature fluctuates greatly in the process of coffee extraction. The machines of many small household appliance brands are like this (such as Cankun, Delong, Electrolux, etc.). After all, these brands are not professional coffee makers. Another thing to consider is a good heat conduction material, a good machine has a better circuit and pipeline design, using copper or stainless steel as the main material of the coffee machine, they have good thermal conductivity (to ensure uniform and stable temperature). Otherwise, it is still more than 90 degrees from the boiler to 70 or 80 degrees from the coffee machine, which will be more obvious in the low temperature environment.

American coffee machine coffee powder thickness

Coffee powder thickness

Coffee machine coffee powder thickness

American coffee machine coffee powder thickness