Pre-infusion

Short Description:
The initial stage of the espresso extraction process, where water soaks the ground coffee, leads to a more even and complete extraction.

Long description:
Pre-infusion is a process where water is allowed to sit briefly in the ground coffee before full pressure extraction. This step improves the uniformity of the extraction by allowing the ground coffee to soak evenly, resulting in a smoother and fuller flavor profile.

Pre-infusion is typically accomplished in the following steps:

Setup - After inserting the portafilter into the "group head" and turning on extraction, low water pressure is first applied to the coffee.

Absorption - The coffee is evenly moistened and softened, allowing for more even extraction during the main phase.

Main Extraction - After pre-infusion, the water pressure is increased to the amount needed for full espresso extraction.

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