The Chemex: When Bauhaus Design Met Coffee Brewing

In 1943, the Illinois Institute of Technology’s design faculty named the Chemex coffeemaker one of the finest examples of American industrial design. The same year, the Museum of Modern Art in New York added one to its permanent collection. The Smithsonian Institution has one. The Corning Museum of Glass has one. The Chemex has been continuously manufactured, without significant design changes, since 1941. It is one of the few objects in American design history that is simultaneously a functioning kitchen appliance and a museum artifact.

Dr. Peter Schlumbohm would not have been surprised by any of this. He believed, with a conviction that his colleagues found excessive and his customers found charming, that he had invented something close to perfect.

He was not entirely wrong.

Peter Schlumbohm and the American Invention Culture

Peter Schlumbohm was born in Kiel, Germany, in 1896, and trained as a chemist at the University of Berlin, where he received his doctorate in chemistry in 1926. He was, by temperament and training, a man who approached every problem as though it were a chemistry problem — which, in the case of coffee, it essentially is.

Schlumbohm emigrated to the United States in 1936, one of thousands of German-Jewish professionals who left Germany ahead of what was coming. He settled in New York, filed patents prolifically — ultimately more than 300 over his lifetime — and threw himself into the business of invention with an energy that struck American observers as characteristically European and characteristically eccentric. He worked on everything: a portable air conditioner, a cocktail shaker with a built-in strainer, a portable baby bath, traffic signal improvements, and a continuous stream of kitchen appliances.

The Chemex emerged in 1941. Schlumbohm was working with laboratory glassware — he understood Pyrex, understood heat-resistant borosilicate glass, understood the relationship between vessel shape and thermal behavior. He looked at the coffee methods available to Americans in 1941: percolators (which recycled brewed coffee back through the grounds, producing bitter over-extraction), vacuum brewers (which were elegant but fragile and complicated), and simple drip machines (which were inconsistent). He decided to apply the principles of laboratory filtration to coffee brewing.

The result was a single vessel: a waist-cinched borosilicate glass carafe with a wooden collar held by a leather tie, designed so that the upper half functioned as a brewing chamber (where filter and coffee sat) and the lower half functioned as a carafe (where the brewed coffee collected). The filter — Schlumbohm designed a proprietary paper filter, thicker and more tightly woven than standard filters — sat in the upper opening, held in place by the glass’s funnel geometry.

The design was, at its core, a chemistry lab Erlenmeyer flask married to a laboratory funnel, refined through months of iteration and rendered in beautiful proportion. Schlumbohm called it the Chemex, a portmanteau of “chemistry” and “excellence.”

He was also, it should be noted, one of the great self-promoters of American mid-century design culture. He drove a Rolls-Royce. He referred to himself in the third person. He staged elaborate parties in his New York apartment. He described his Chemex as “the most beautiful design of the twentieth century” with a straight face. He was beloved and mocked in equal measure, and he did not particularly distinguish between the two.

The Bauhaus Connection

To understand what Schlumbohm was doing aesthetically, it helps to understand the Bauhaus school that had formed the visual culture of his generation of European designers. The Bauhaus, founded in Weimar Germany in 1919 by architect Walter Gropius, proposed that design should unite art and industry, that beauty and function were not in tension but in alignment, and that the finest design was the design that eliminated everything unnecessary.

Schlumbohm was not a Bauhaus alumnus, but the school’s influence on German design culture was so pervasive that any German-trained professional working in the 1920s and 1930s absorbed its principles by proximity. The Chemex is, in many ways, a Bauhaus object: clean lines, honest materials, no ornamentation that doesn’t serve function, and a form that is determined entirely by what the object does.

The wooden collar and leather tie are the most obvious aesthetic elements. They are also functional: the waist of the Chemex gets hot when brewing, and the collar provides a grip. But Schlumbohm could have solved this problem with a thermoplastic handle, which would have been cheaper and easier to manufacture. He chose wood and leather because they looked right — and because he believed that a product used daily in the home should be beautiful as well as functional. The MoMA agreed.

The Science of the Bonded Filter

The Chemex filter is the device’s most technically distinctive element, and the source of both its greatest strengths and its most common criticisms.

Chemex filters are 20–30% thicker than standard paper filters. They are made from proprietary bonded paper — “bonded” referring to a process that creates a more uniform fiber structure, producing a tighter weave with more consistent pore size. The natural (unbleached) versions are beige; the white versions are oxygen-bleached.

The thick, tight filter does two things. First, it removes virtually all coffee oils (lipids) from the brew. Coffee oils carry flavor compounds, particularly aromatic molecules responsible for some of the more complex, roasty, and heavy notes. A Chemex brew is therefore notably cleaner and lighter-bodied than a French press, a Moka pot, or even a V60 with a standard filter — because even V60 filters pass some oils. Second, the thick filter slows extraction. Water must work harder to pass through the thicker paper, which means longer contact time with the grounds.

This combination — clean, oil-free, with extended contact time — produces coffee with extraordinary clarity of flavor. The acids are bright and clean. The sweetness is transparent. The complexity that comes from subtle compounds in high-quality single-origin coffee is more legible through a Chemex filter than through almost any other method because there is so little interference from oils, fines, or roasty heaviness.

The criticism is the inverse of the virtue: the Chemex strips the coffee of body. Some coffee drinkers — particularly those accustomed to French press, espresso, or Moka pot coffee — find Chemex coffee thin, or delicate to the point of seeming weak, even when the concentration is appropriate. This is not a defect. It is a design choice, and it suits some coffees and some palates better than others.

What Coffee Works Best in a Chemex

The Chemex’s filter reveals bright, complex, high-acid coffees with exceptional clarity. Ethiopian naturals and washed Kenyans — with their fruit-forward acids, floral aromatics, and complex flavor profiles — shine in a Chemex because the filter lets the bright compounds through while catching the heavier lipid-bound flavors that might muddy the picture.

Dark roasts are a poor match. A dark roast has fewer delicate aromatic compounds and more roasty, bitter compounds; the Chemex’s clarity amplifies the bitterness without the oils that, in a French press, might soften it. A medium-light to medium roast from a bright, complex origin is the ideal Chemex candidate.

Colombian Huila, Yirgacheffe, Kenya, Guatemalan highland coffees — these are the natural territory of the Chemex.

The Brewing Guide

The Chemex’s single-vessel design creates one brewing parameter that is unusual: you cannot easily monitor or control the draw-down rate independently, because there is no separate dripper to lift out or adjust. The filter paper’s position in the funnel and the grind size are your primary controls.

Equipment needed: Chemex 6-Cup, Chemex natural filters (or white, pre-rinsed), a gooseneck kettle, a scale, a timer.

Dose: 40g coffee
Water: 640g (1:16 ratio)
Water temperature: 93–96°C (200–205°F) — slightly hotter than V60, to compensate for the thick filter’s resistance
Grind: Medium — slightly coarser than V60, to prevent excessive draw-down time through the thick filter
Total brew time target: 4:00–5:00

Setup: Open the Chemex filter with three layers on the spout side (the side with the air channel). Place it in the top of the Chemex. Rinse with 200g of hot water — the thick filter requires a thorough rinse to remove paper taste. Dump the rinse water from the bottom. Add your ground coffee to the filter. Give it a gentle shake to level the bed.

Bloom (0:00–0:45): Pour 80g of water in a slow spiral. Saturate every ground. Let bloom for 45 seconds — the thick Chemex filter benefits from a longer bloom than the V60, allowing CO2 to escape through the denser paper.

First pour (0:45–2:00): Pour 280g of water slowly and evenly, spiraling from the center outward. Maintain a pour rate that keeps the water level roughly constant in the filter — you are filling, not flooding. The filter will slow the draw-down enough that you need to be patient.

Second pour (2:00–3:15): Pour the remaining 280g in the same manner. The water level will be high in the filter; this is normal. Let it draw down.

Draw-down (3:15–end): The water should drain through by 4:00–5:00. The paper will grip the grounds and the bed will look dense and even when done. Remove the filter (it will be hot — use a paper towel or be careful), and the Chemex is ready to serve directly.

Important note: Because the Chemex is the brewer and the carafe, coffee continues to extract slightly from any fines that passed the filter while it sits. Serve promptly, or transfer to a thermal carafe if you will not be drinking immediately.

The Chemex in Culture

The Chemex’s cultural footprint is disproportionate to its market share. It has appeared in Breakfast at Tiffany’s, American Horror Story, Mad Men, and dozens of other films and television shows as shorthand for “discerning but approachable taste.” It was selected by the Illinois Institute of Technology in 1943 as one of the 100 best designs of modern times. It is in the MoMA permanent collection.

There is something interesting in this cultural positioning. The Chemex is not the most technically demanding pour-over (that’s the V60). It is not the most consistent (that’s various automated devices). It does not produce the strongest, richest cup (that’s the Moka pot or espresso). What it does is make excellent coffee look and feel like art. The ritual of blooming the grounds, pouring in slow spirals, watching the coffee drip into the borosilicate flask — it is a daily ceremony that Schlumbohm designed deliberately.

“Chemex,” he once said, “is not just a coffee maker. It is an experience.” He was right, and he was selling something, and those two things are not mutually exclusive.

Care and Maintenance

The Chemex’s borosilicate glass is dishwasher safe, but the wooden collar and leather tie are not. Remove the collar before washing (it slips off easily) and wash the glass in the top rack of the dishwasher or by hand with a bottle brush. The wood can be wiped with a damp cloth. Coffee oils will stain the glass over time; a periodic soak with a solution of water and white vinegar, or a dedicated coffee equipment cleaner like Cafiza, will remove them.

The Chemex 6-Cup is the most popular size — it brews enough for two generous cups or three smaller cups, and the proportion of the design looks best at this scale. The 8-Cup is also available if you regularly brew for a larger group.

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Shop the Lineup

Product	Price	Link
Chemex 6-Cup Classic	$44.95	Shop
Chemex Natural Filters (100-pack)	$12.95	Shop

Shop this brewer at Contour Coffee

Chemex 6-Cup Classic — $44.95

The Museum of Modern Art has one. Your kitchen should too. Borosilicate glass, wood collar, leather tie — unchanged since 1941 for a reason.

Chemex Natural Filters (100-pack) — $12.95

The proprietary bonded filter that makes Chemex coffee distinctively clean and bright. Natural (unbleached) version. One hundred brews worth.