The Chemex: Design Icon, the Perfect Cup, and How to Brew It Correctly

Few objects in kitchen history have achieved what the Chemex has: genuine inclusion in a major art museum's permanent collection, a cameo in a Hitchcock film, and a reputation among specialty coffee professionals as one of the cleanest-tasting brewers ever designed. Peter Schlumbohm invented it in 1941, New York's Museum of Modern Art added it to its permanent collection in 1944, and the brewer has remained almost entirely unchanged since. Its combination of hourglass borosilicate glass and a proprietary bonded paper filter produces a cup unlike anything a French press, drip machine, or V60 can replicate. Here is what makes the Chemex different, and how to use it correctly.

The History: A Chemist Who Designed a Coffee Brewer

Peter Schlumbohm was a German-born chemist and inventor who held more than 300 patents by the time he died in 1962. He did not set out to revolutionise coffee culture. He set out to design a brewer using laboratory principles: control the variables, eliminate the flaws introduced by machine parts and valves, and let the filter do the work. The result was a piece of borosilicate laboratory glass, shaped like an Erlenmeyer flask with an hourglass waist, fitted with a wooden collar and leather tie (the collar prevents burned hands; the tie keeps the collar in place). The name came from his company, Chemex Corporation.

MoMA's inclusion of the Chemex in its permanent collection in 1944 was not a marketing exercise. The Industrial Design curators selected it as an example of functional design executed with aesthetic clarity: every element serves a purpose, nothing is decorative. Alfred Hitchcock used it in Strangers on a Train (1951). It appears in the series Breaking Bad. It is one of only a handful of kitchen objects to have moved between the worlds of design history and food culture with equal credibility.

What Makes the Chemex Different: The Bonded Filter

The Chemex's defining feature is not the glass. It is the filter. Chemex proprietary bonded paper filters are approximately three times thicker than standard pour-over papers (such as those used in a V60 or Kalita Wave). That thickness produces two effects. First, it removes essentially all coffee oils and micro-fines from the brew. Second, it slows the flow rate significantly, extending contact time between water and grounds.

The result is a cup that is exceptionally clear and bright, with no sediment, no oiliness, and a clean, sweet aftertaste. Origin character (the fruity, floral, or nutty notes of a specific bean) comes through with unusual clarity precisely because there is nothing else in the cup to muddy the signal. This is why specialty coffee roasters who want to showcase a particularly complex single-origin bean often recommend a Chemex or V60 rather than a French press.

The trade-off is body. The oils that a French press leaves in the cup are also the compounds that create mouthfeel and perceived weight. A Chemex brew is lighter-bodied than a French press, and slightly less texturally rich than a well-made espresso-based drink. Some drinkers find this elegance; others find it thin. It depends on what you want from a cup.

Chemex vs V60 vs French Press

These three brewers represent three distinct philosophies. The French press uses full immersion and no filter (a metal mesh screen keeps grounds out of the cup but allows all oils through): the result is heavy-bodied, rich, sometimes slightly gritty. The V60 (Hario, Japan) uses a thin paper filter and a fast-draining design: the result is bright and articulate, with more acidity and clarity than a French press. The Chemex sits in a particular position: its filter is thicker than the V60's, removing more oils and producing a slightly less acidic cup, but its design also allows for a more controlled pour than many beginners achieve with a V60.

For first-time pour-over buyers, the Chemex is often easier to use consistently than a V60, because the wider mouth and the glass vessel make it easier to see what is happening and control the pour. The V60 rewards more precise technique and produces a slightly more complex cup in expert hands. Neither is objectively better: they are tools for different preferences.

How to Brew the Chemex Correctly

The ideal recipe for a 6-cup Chemex (the most popular size) is as follows.

Equipment and Ingredients

• 6-cup Chemex brewer
• Chemex bonded square filters (the natural unbleached version or the white bleached version; taste difference is negligible if rinsed)
• 30g of freshly ground coffee (medium-coarse grind, coarser than a V60 to compensate for the restrictive filter)
• 450ml of water at 93–96°C (just off the boil, or use a temperature-controlled kettle)
• A gooseneck kettle for pour control
• A scale and timer

The Fold and Why It Matters

Chemex filters are square sheets folded into a cone. The correct fold places three layers on the side facing the spout. This is not arbitrary: the spout is where the filter is most likely to collapse against the glass wall and block airflow, which would cause the brew to stall. Three layers of filter on the spout side provide structural support and keep the filter standing freely. A single-layer cone (folded incorrectly) will stall in the middle of the brew and produce an inconsistent, over-extracted cup.

The Recipe

1. Rinse the folded filter with hot water (this removes paper taste and pre-heats the vessel). Discard the rinse water.
2. Add 30g of medium-coarse ground coffee to the filter. The ratio is 1:15 (1g coffee to 15ml water).
3. Start your timer. Pour 60ml of water (twice the coffee weight) over the grounds in a circular motion, ensuring all grounds are wet. This is the bloom. Wait 30 seconds. CO2 released from fresh grounds will cause the coffee bed to swell and degas; this bloom ensures even extraction later.
4. At 30 seconds, begin pouring in slow, steady spirals from the centre outward. Add water in 2–3 more pours, aiming for the total 450ml to be added by around 3 minutes 30 seconds.
5. Allow the drawdown to complete. Total brew time should be 4–4.5 minutes. If it is significantly faster, grind coarser; if it takes longer than 5 minutes, grind slightly finer.

Sizes, Filters, and Accessories

The Chemex Classic Series comes in four sizes: 3-cup (ideal for 1–2 people, brewing roughly 350ml), 6-cup (the most popular, brewing 700–800ml), 8-cup, and 10-cup. There is also a Handblown Series (more expensive, slightly thicker glass, the same brew result) and a Glass Handle Series for those who find the wooden collar awkward.

Chemex bonded filters are proprietary and not interchangeable with other pour-over papers. They are sold in boxes of 100 for approximately $12 (natural unbleached) or $13 (white). They are available at most kitchen retailers, on Amazon, and directly from Chemex. The Chemex cleaning brush ($8), with its long flexible handle, is genuinely useful: the narrow hourglass neck makes a standard bottle brush inadequate for reaching the interior of the lower globe.

Related: AeroPress Guide: How to Brew and Why It Works | Pour Over vs French Press: Which Brewing Method Is Right for You?