Graef ES850EU Espresso machine with sump filter holder Aluminium 1470 W
The development of espresso technology, as the Graef portafilter espresso machines dominate it, dates back to 1901. 6 to 7 grams of finely ground coffee is extracted from the machine under high pressure (approx. 9 bar) in approx. 25 to 30 seconds. The water has a temperature of 90 to 96°C. For portafilter espresso machines, the coffee flour is filled and pressed manually into the removable sieve, a process known as taping.The way coffee is prepared varies according to culture, national customs or personal taste. For this purpose, the bean is ground into different degrees of fineness depending on the preparation type. Most preparation methods use water below the boiling point. If the water temperature is too low, the coffee tastes thin and sour, if the water is too hot, the bitter substances are increasingly dissolved from the coffee powder and influence the taste.This text is machine translated.
