Coffee extraction with the V60: when hydraulics and chemistry shape the cup
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- 8 mars 2026
- Brew Méthodes
The V60 is often described as a “simple” brewing method. In reality, it is one of the most complex from a physico-chemical perspective.
Why? Because it relies on a delicate interaction between:
• gravity
• flow rate
• resistance of the coffee bed
• diffusion
• convection
With the V60, everything happens in the movement of water.
The chemical foundations of percolation extraction
Like any coffee extraction method, the V60 aims to selectively dissolve certain compounds:
• organic acids (citric, malic, phosphoric)
• sugars and Maillard reaction products
• volatile aromatic compounds
• polyphenols
• caffeine
However, unlike immersion methods such as the AeroPress, percolation creates a sequential extraction process: fresh water continuously encounters coffee that has already been partially extracted.
The main risk is uneven extraction.
The coffee bed: the heart of the system
In the V60, ground coffee forms a porous medium.
Its properties determine:
• flow speed
• contact time
• hydraulic resistance
• extraction uniformity
Poorly calibrated grind size can lead to:
• channeling
• localized under-extraction
• over-extraction in other areas
This is why the V60 Dripper is particularly unforgiving when it comes to grind quality.
Diffusion, convection, and flow rate
Migration of soluble compounds into water, dependent on:
• surface area
• temperature
• time
Convection
Generated by pouring and the agitation of the coffee bed.
Flow rate controlled by:
• grind size
• coffee dose
• pouring technique
In practice, the barista controls chemistry indirectly, through movement and pouring technique.
Temperature: a lever of selectivity
In V60 brewing, temperature strongly influences:
• extraction speed
• solubility of heavier compounds
Temperatures that are too high amplify bitterness and astringency.
Moderate temperatures (typically 88–94°C / 190–201°F, depending on the coffee) allow:
• greater aromatic clarity
• more elegant acidity
Agitation and pouring: the role of the kettle
Every pour modifies:
• the structure of the coffee bed
• convection dynamics
• extraction speed
A pour that is too aggressive breaks the bed and promotes channeling.
A pour that is too gentle may under-extract certain areas.
In V60 brewing, the gesture itself becomes a chemical parameter.
Why the V60 is an exceptional teaching tool
The V60 allows baristas and coffee professionals to:
• visually observe extraction
• understand the role of flow rate
• refine sensory analysis
• precisely diagnose and correct a cup
This is why it is widely used in barista training and coffee competitions.
The V60 is a revealer.
It does not forgive mistakes, but it teaches.
To understand the V60 is to understand percolation extraction in its purest form.