Chemex: the filter method for perfectionists

May 1, 2026Carrera Café
Filter Method

Chemex

The filter method for perfectionists
Invented
1941, New York
Filtration
Thick bonded paper
Ratio
1:15 to 1:17
Time
3:30 to 4:30 min

The Chemex is as much a design object as a brewing tool. Created by a chemist in 1941, it has hardly changed since. Its blown glass silhouette, thick paper filter, and cup result: everything here is a statement of intent.


The object

Born in a laboratory

Peter Schlumbohm, 1941

The Chemex is part of the permanent collection at MoMA in New York. That says a lot about its status: half tool, half sculpture.


Design as function

Peter Schlumbohm was a chemist, not a designer. But his scientific approach led him to create an object of rare elegance. The pinched glass neck serves as a handle, the wood and string as a thermal sleeve, the glass funnel as a reservoir.

Everything serves the cup. No element is decorative for no reason. This is exactly the kind of rigor we appreciate in the specialty coffee world.

The bonded filter: the key to the profile

The Chemex filter is 20 to 30% thicker than standard paper filters. This extra thickness retains coffee oils (cafestols and kahweols) that pass through other methods.

Result: a cup of exceptional clarity, almost luminous. Some find this profile too "clean," even sterile. For others, it's the ideal cup: each aroma is isolated and identifiable. An extreme V60.

The technique

The Chemex recipe

Precision and patience

The Chemex is less forgiving than the V60. Precision is non-negotiable.


★ Recipe Chemex 6 cups
Coffee
40g
Water
640g (92-94°C)
Grind
Medium-coarse
Total time
4:00 to 4:30 min
0:00 — Filter rinse

Rinse the filter with hot water to remove paper taste and preheat the Chemex. Discard the water.

0:00 — Bloom (pre-infusion)

Pour 80g of water over the coffee (2x the dose). Let it bloom for 45 seconds. The coffee releases its CO2 — this is the visible degassing.

0:45 — Pouring

Pour in 3 to 4 concentric additions from the inside out. Keep the water level stable. Each pour: about 180g.

4:00 to 4:30 — End of filtration

The coffee bed should be flat at the end. If it’s funnel-shaped, the filtration was too fast (grind too coarse). If it overflows, too slow.

The right coffee

Which origins to choose

The Chemex enhances floral and fruity notes

The thick filter reveals delicate aromas. Favor washed coffees with a light roast.


★ Ethiopia Yirgacheffe — washed

The perfect match. The clarity of the Chemex and the floral aromas of Ethiopia create a sublime cup. Jasmine, bergamot, black tea. Bright.

Colombia Huila — washed

Red fruits, light caramel, bright acidity. The rounder body still comes through despite the intense filtration.

To avoid: very dense natural coffees

Very fruity natural coffees (strawberry, red wine) lose some body and intensity through the thick filter. Save them for the AeroPress.

At Carrera Café

The ideal coffees for your Chemex

Our partner roasters offer high-altitude washed single origins, perfect for enhancing your Chemex.

Explore our filter coffees

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