I can give you the full pressure profile for one of my espressos: the dose, every change in pressure, every second.
Nothing is lost by publishing it.
The numbers are exact. They are also no longer entirely true.
They describe where I arrived with one coffee in January. They do not contain the listening that brought me there.
One Coffee, Seven Stages
The coffee is a Panama Finca Lerida Geisha, honey processed, from a Gift Lot the farm sent me. For a double espresso, I use 21.3 grams.
I begin at two bar, usually for three to five seconds. I am not waiting for a fixed time. I am waiting for the coffee bed to become fully wet without allowing the first drop to fall.
Then the pressure returns to zero for seven to ten seconds. The water is already inside the coffee. Now I leave it there.
Together, these two stages form the pre-infusion: first I let the water enter, then I give the coffee time to receive it.
From zero, the pressure rises to six bar for two to three seconds, then to seven bar for another two to four. I want the coffee bed to settle under the rising pressure, not be struck by it.
Eight bar follows, held for six to ten seconds. This is the centre of the profile. The body, sweetness and main line of the espresso take shape here.
From eight, I return to six bar for five to seven seconds. The final stage is five bar. Its duration is not programmed. I stop it by hand.
Two bar. Zero. Six. Seven. Eight. Six. Five.
Those are the seven stages I recorded in January.
It is not exactly the profile I use today. The difference is small, and nothing in the original version was wrong.
The coffee kept changing. I kept listening.
Where the Coffee Opens
Eight bar is not a pressure I prefer. It is where this Lerida opens.
At that pressure, the espresso keeps the clarity I found in the roast. The ripe berries and florals remain distinct. The sweetness has weight, but the line through the cup stays unbroken.
Other coffees answer differently.
The Colombia La Pradera Gesha on my bar has a wine-like character. At nine bar, I could make a sound espresso from it. The ratio was right. The time was right. The cup was balanced.
But its wine-like character remained quieter than I knew it could be.
I raised the pressure a little at a time, tasting each cup. Ten bar brought more. Eleven held together. Twelve came closer.
At thirteen bar, it opened.
The oils became fuller. The wine-like aroma rose with greater force. What had always been present, but restrained, finally became clear.
Reaching thirteen bar did not finish the work. It created another question: how long should that pressure last?
One second was too brief. The coffee had no time to unfold inside it. Five seconds carried the cup too close to bitterness and astringency, after the best part had already arrived.
I continued searching between them, one espresso at a time.
The Guatemala El Injerto Pacamara reaches its own centre at twelve bar. Lerida reaches eight.
The higher number is not better. The lower number is not more delicate.
Some coffees open under a light hand. More force only makes them withdraw. Others remain quiet under every gentle touch and begin to speak only when the pressure arrives with the force of a drumbeat.
The pressure follows the coffee, not the other way around.
What Must Stay Still
Even the same green coffee does not keep one permanent answer.
When I change the roast, the material inside the portafilter changes with it. Its structure is different. Water enters it differently. The balance I found at one pressure may move somewhere else.
There are times when I deliberately refuse to follow that movement.
When I roasted four versions of the Lerida and needed to compare them, I kept the espresso profile unchanged. Only the roast was allowed to move. Otherwise, I would not know whether the difference in the cup came from the drum or from the machine.
Comparison requires stillness.
Once I understand the roast, I let the pressure move again.
That is why I do not believe in one pressure for Panama Geisha, one profile for Pacamara, or one curve for every coffee from the same country.
For me, a profile belongs to a much narrower meeting: this bean, this roast, this period of rest, this cup.
When any one of them changes, the same numbers may still produce espresso. They may even produce good espresso.
But they no longer describe the same coffee.
The Portrait
A recipe is built to be repeated.
A portrait is built to be true.
The seven stages above are a portrait of the Lerida as I understood it in January. Every number is precise. None of them is universal.
If I place another coffee inside those numbers, the outline remains, but the subject disappears.
Even the original subject will not remain still forever.
That is why I can publish the whole profile without hesitation. The important part was never contained in eight bar, thirteen bar, or a particular number of seconds.
It was in the listening that brought me there.
The numbers are the marks left behind.
The numbers belong to January. The coffee has kept moving.
At the Cherry Lab bar, I am still listening.