Preinfusion

During the PreinfusionDuring the preinfusion (also called prebrew cycle), the coffee powder is evenly soaked by the water. This takes place before the actual extrac... read more (also called prebrew cycle ), the coffee powder is evenly soaked by the water. This is done before the actual extraction of the coffee powder, which gives the espresso a particularly special aroma. During this process, the coffee powder is bonded (entirely without pressure) to form a more stable mass that can better withstand the high pressure of the subsequent extraction.