The Chemex Coffeemaker is a manual, pour-over style glass-container coffeemaker, invented by Peter Schlumbohm in 1941, and which continues to be manufactured by the Chemex Corporation in Chicopee, Massachusetts.
In 1958, designers at the Illinois Institute of Technology said that the Chemex Coffeemaker is "one of the best-designed products of modern times", and so is included in the collection of the Museum of Modern Art in New York City.
The Chemex Coffeemaker consists of an hourglass-shaped glass flask with a conical funnel-like neck (rather than the cylindrical neck of an Erlenmeyer flask) and uses proprietary filters, made of bonded paper (thicker-gauge paper than the standard paper filters for a drip-method coffeemaker) that removes most of the coffee oils, brewing coffee with a taste that is different than coffee brewed in other coffee-making systems; also, the thicker paper of the Chemex coffee filters may assist in removing more cafestol, a cholesterol-elevating compound found in coffee oils.
The most visually distinctive feature of the Chemex is the heatproof wooden collar around the neck, allowing it to be handled and poured when full of hot water. This is turned, then split in two to allow it to fit around the glass neck. The two pieces are held loosely in place by a tied leather thong. The pieces are not tied tightly and can still move slightly, retained by the shape of the conical glass. For a design piece that became popular post-war at a time of Modernism and precision manufacture, this juxtaposition of natural wood and the organic nature of a hand-tied knot with the laboratory nature of glassware was a distinctive feature of its appearance.
Coffee is brewed by first placing the paper filter and the ground coffee in the neck of the flask, while heating water to 93-96 °C in a separate vessel; then "blooming" (moistening) the ground coffee by pouring some hot water onto the dry coffee, and finally, by pouring the desired quantity of water (number of cups) over the ground coffee, and awaiting it to percolate down, through the coffee and the paper filter, into the flask.
In popular culture
In the 1954 romance movie Sabrina, a Chemex Coffeemaker can be seen in the corner of Linus's bar in his office. In spy literature, film, and television, the Chemex coffeemaker has appeared in the novel From Russia, with Love (1957), by Ian Fleming, who describes James Bond, when in London, brewing his breakfast coffee with a Chemex, using coffee bought from the De Bry's shop in New Oxford Street.
In the television comedy programme The Mary Tyler Moore Show (1970–77), the Mary Richards (Mary Tyler Moore) character has such a coffeemaker in the kitchen of her apartment. Similarly, a Chemex can be spotted on the stovetop in the pilot of Friends (1994)
A Chemex can also be seen in the German movie Vor der Morgenröte, a biographic picture about Stefan Zweig.
A "Chemex type" coffee maker can be seen on Det. Charles Boyle's desk in Brooklyn 99 (2013), Season 1, Episode 12 "The Bet". He grinds 24g of "gorgeous new coffee beans" to the consistency of "Tunisian sand".
- "Dr. Peter Schlumbohm Dead; Inventor of Coffee Maker, 66; His Chemex Called One of 100 Best Modern Devices—300 Items Patented" The New York Times; November 07, 1962 
- "Chemex Coffee Makers" LA Times, Jan 8, 1989.
- New York Times Nov 7, 1959
- Science Daily
- Design for the Real World, Victor Papanek
- "Brewing 101 With CHEMEX®". Chemex® Corp. Retrieved 6 January 2015.
- "Chemex brewing guide". Flying Roasters. Retrieved 19 September 2017.
- Fleming, Ian (1957). From Russia, with Love. London: Jonathan Cape.