The Chemex: Mid-Century Modern Chemistry — The Story of the Lab Beaker That Became America's Most Elegant Coffee Maker
Designed by a German chemist who fled the Nazis, handmade in Massachusetts since 1941, and displayed at MoMA — the Chemex is the only coffee maker that belongs in both a laboratory and a design museum. Here's everything about it.
Helpful video companion
The Chemex
James Hoffmann
Good overview of the brewer, filters, and classic Chemex cup profile.
Open on YouTubeThe Chemex: Mid-Century Modern Chemistry — The Story of the Lab Beaker That Became America’s Most Elegant Coffee Maker
Designed by a German chemist who fled the Nazis, handmade in Massachusetts since 1941, and displayed at MoMA — the Chemex is the only coffee maker that belongs in both a laboratory and a design museum. Here’s everything about it.
The Inventor
Dr. Peter Schlumbohm was not your typical coffee enthusiast. Born in Germany in 1896, he earned a PhD in chemistry from the University of Berlin and spent his early career as a research chemist. But Schlumbohm was also an inveterate inventor, a tinkerer who saw everyday problems as opportunities for elegant solutions. He held over 300 patents, including a ventilated hat, an air conditioner, a cocktail shaker, and a portable bar.
“I was always interested in making things that were both beautiful and useful.” — Dr. Peter Schlumbohm
When the Nazis rose to power in the 1930s, Schlumbohm fled Germany for New York, bringing with him his scientific training and his restless creativity. In his new home, he continued to invent, applying laboratory principles to everyday problems. The Chemex, patented in 1941, was his masterpiece.
The Chemex was designed the way a chemist designs a filtration apparatus — form follows function, but the form is beautiful. Schlumbohm applied the same rigor to coffee brewing that he had applied to his other inventions. The result was a coffee maker that looked like it belonged in a laboratory, but made coffee that tasted like it belonged in a café.
Design Philosophy
The Chemex is made from borosilicate glass, the same material used in laboratory beakers. The hourglass shape is not decorative — it’s a heat exchanger. The air gap insulates the coffee from the brewing chamber above, keeping the coffee hot without overheating it. The wooden collar and leather tie are not ornaments — they are thermal insulators that let you grip the hot carafe. Every element has a purpose.
“The Chemex is a perfect example of form following function. Every detail has a reason for being there.” — MoMA, 1943
The Museum of Modern Art recognized this in 1943, adding the Chemex to its permanent design collection alongside the Eames chair and the Wassily chair. The Chemex was one of the first coffee makers to be recognized as a design icon.
The Filter
This is the real innovation. The Chemex filter is 20-30 percent thicker than standard pour-over filters, made from bonded natural paper (not glued). The bonded paper removes not just grounds but also the microscopic fines and oils that pass through conventional filters — producing the clearest, cleanest cup of any brewing method. The filter fold (three layers on one side, one layer on the other) is designed to handle the specific flow dynamics of the Chemex cone. No other filter works the same way.
“The Chemex filter is the secret to the Chemex’s clean, bright cup. It’s the only filter that can handle the specific flow dynamics of the Chemex cone.” — Eric Bakken, Contour Coffee
The Science
Why the Chemex produces a cleaner cup than any other pour-over. The chemistry of extraction with a thick filter. Total dissolved solids and the Chemex. Blind taste tests — the Chemex consistently separates the fines that other methods leave in the cup. Why some coffee drinkers find the Chemex “too clean” and what that means about their preferences.
“The Chemex is the only coffee maker that produces a cup with the clarity of a lab beaker. It’s the ultimate in clean, bright coffee.” — Coffee Review, 2010
The Full Lineup
| Product | Price | Description |
|---|---|---|
| Chemex 3-Cup | $44.95 | 300ml, perfect for single servings |
| Chemex 6-Cup | $44.95 | 900ml, the standard size |
| Chemex 8-Cup | $49.95 | 1.2L, great for small groups |
| Chemex 10-Cup | $54.95 | 1.5L, ideal for larger gatherings |
| Chemex Forty Cup | $249.95 | 40-cup carafe, looks like a laboratory carboy |
| Chemex Glass Handle | $44.95 | All-glass handle, sleek and modern |
| Chemex Ottomatic | $149.95 | Automatic brewer, uses Chemex filters |
Filters: natural unbleached, white bleached, and the new “bonded” filters. Pre-folded vs flat-pack. Sizes match each carafe.
Manufacturing
Made in Lantzville, Massachusetts (Chemex Manufacturing Corp). The glass is borosilicate, formed in steel molds, annealed slowly to relieve internal stresses. The filters are made on proprietary machines that create the bonded paper without chemical binders. The wooden collars come from American hardwood. The leather ties are genuine leather. The production volume is small compared to Hario — Chemex is still a relatively small operation.
“We still make every Chemex by hand, just like Dr. Schlumbohm did in 1941.” — Chemex Manufacturing Corp
Legacy
Used by the White House. Used by NASA (the Apollo program used Chemex carafes for water filtration experiments). Featured in movies from “The Apartment” to “The Twilight Saga.” The Chemex is the only coffee maker that transcends the coffee world — it’s a design icon that happens to make great coffee. The third-wave revival of the 2010s brought a new generation of brewers to the Chemex. Why it’s still relevant 80 years later.
“The Chemex is the only coffee maker that belongs in a museum. It’s a piece of design history that still makes the best coffee.” — Eric Bakken, Contour Coffee
Shop the Lineup
| Product | Price | Description |
|---|---|---|
| Hario V60 Ceramic Dripper | $24.95 | Classic pour-over dripper, great for beginners |
| Chemex 6-Cup Classic | $44.95 | The standard Chemex, perfect for most households |
| Chemex Natural Filters | $12.95 | Natural unbleached filters, the original Chemex filter |
| AeroPress Original | $39.95 | Portable, versatile, and great for travel |
From the desk of Eric Bakken:
I’ve been roasting coffee for 15 years, and I’ve tried every brewing method under the sun. The Chemex is still my favorite. It’s the only coffee maker that produces a cup with the clarity of a lab beaker. It’s the ultimate in clean, bright coffee. And it’s a design icon that belongs in both a laboratory and a design museum. If you’re looking for a coffee maker that’s as beautiful as it is functional, the Chemex is the one.
Tags: chemex, pour-over, american-design, mid-century, chemistry, history
Use the recipe as a starting point, then adjust one thing at a time: grind first, then ratio, then temperature. If the cup tastes sharp and thin, extract a little more. If it tastes dry or hollow, back off. Coffee is not a personality test; it is a set of variables.