A brief history of the Chemex
In an age of sophisticated electronics, capsule machines and coffee makers that deliver an espresso, latte or cappuccino at the touch of a button, we are also returning to classic brewing.
Some people remember traditional filter machines fondly, while younger coffee lovers are discovering the AeroPress, pour-over drippers and Chemex. Some brewers are familiar; others will feature in our blog series. Today we look at the Chemex and its brewing method.
A chemist’s approach to coffee
The Chemex was invented by chemist Dr Peter Schlumbohm, whose knowledge of filtration and extraction helped inspire the design. A prolific inventor, he became particularly well known for this coffee maker.
Where did the idea come from? Look closely and the brewer resembles a laboratory flask. Schlumbohm adapted that form, combined it with a filter and developed a design suitable for making and serving coffee.
A pouring spout made serving easier, while the wooden collar provided both a distinctive appearance and a comfortable grip away from the hot glass.
The brewer quickly became popular and appeared in well-known films, including Rosemary’s Baby. The Chemex company is associated with Pittsfield, Massachusetts. The Museum of Modern Art recognised the design in 1943, and the brewer became a celebrated example of functional design.
Brewing with a Chemex
You need hot water, good ground coffee and a suitable filter. Although the principle resembles other pour-over methods, the Chemex’s combination of filter and brewer produces its own distinctive cup.
The brewer is a one-piece, hourglass-shaped vessel made from heat-resistant glass. The classic version has a wooden collar secured with a leather tie around its narrow middle, providing a grip and helping protect your hand from the hot vessel.
Special Chemex paper filters are thicker than many ordinary coffee filters. They retain fine particles and much of the coffee’s oils, helping produce a clear, clean-tasting brew.
Place the filter correctly, rinse it with hot water and discard the rinse water. Add coffee ground for the brewer, then pour hot water gradually over the grounds. The coffee drips through the filter into the lower glass chamber.
The result can be a delicate cup with a beautifully clear flavour and aroma. When you are ready for another fresh batch, replace the filter and coffee and repeat the process.